First of all I'm a tough rater. I don't give five stars unless something is nearly perfect, so don't take 4 stars as a bad sign. This is a great computer overall.
First, some positives. This computer does everything I could ask for. Strava live segments work well, though sometimes segment starts appear when I'm just passing on an adjacent road or trail. Pairing power meters and other devices is seamless. and the data quality is very good. I have the system set to upload rides automatically when I hit the stop button, and they uploads are done faster than my garage door can open. The screen may not be like a top-of-the line phone, but it's a huge upgrade from any bike computer I have had before. The customizable data screens are old news, but really useful, and easy to configure once you get through the first time.
On the negative side, Garmin's software has a few weak spots. At first the computer battery totally drained several times. This wasn't exactly a battery life problem. The computer was getting into a state where it looked off but was actually using full power. Getting the beta firmware solved this. Oddly, the improved firmware hasn't been rolled out to production, though months have passed.
Another one-time problem was updates to the GPS software. It auto-updated during a ride, causing about half of the ride to lose data. Not the end of the world, but it was disconcerting since it was only my 2nd ride or so.
Smaller issues crash detection is a nice idea, but I have triggered it falsely a couple of times, once while simply accelerating from a stop light. I'm not THAT fast. Sorry, everyone, I'm not going to crash myself intentionally to see if it works in that case. The sharp turn warnings have never been useful. The tone either comes after you have already passed the apex, or just before when it would be unsafe to look down to read the message.
This is not really a pro or con, but just be aware that some functions are several levels deep in the menu system. The touch feature is generally very good, but some things may be nearly impossible when flying down a rough road or trail.
I got my 830 coming off an 810. I debated long and hard between it and the 530, as the only difference is touch-screen vs buttons. And, after several months, I can say I made the wrong choice. The touch screen actually makes this less valuable than the 530. It is terrible with gloves, and their software is terrible at dealing with it. I am constantly pulling down something when a want to slide, and so on. It is just annoying. I heard the touch screen was improved, but my 810 did better.
Everything else is fine. I still can't find the compass, the menus are huge disorganized messes, but they are trying to deal with a small space and few controls, I will cut them some slack.
Get the 530. Save $100 AND get a better unit.
I had first purchased 530 and used for the summer and was happy with it very much. But did not like the pushing buttons so much while riding. So went ahead and upgraded to the touchscreen 830 and have been very happy that I did a big improvement and to me worth the money. Even in cold weather riding with gloves screen was easy to use.
My Garmin 820 battery has lost its ability to hold a charge for more than two hours. So I ordered an 830 as a replacement.
I am very pleased so far. I love how it switched from my data screen to the map screen to warn me of an upcoming turn in my course. After the turn the 830 returned to the data screen. That feature is really helpful.
Setup was a little easier than my 820 but still took about an hour to pair my existing sensors and customize the data screens. No where in the manual did it tell me how to change the front and rear gear values but I did finally figured it out. (I have Etap so the 830 will display current gears and battery life).
As in every new product there are always kinks to work out. There were several bugs in the software which were fixed in a beta release that tech support provided. A newer release was issued which I am sure corrected other problems and did not reintroduce my previous issues.
There are so many features and menu pages that requires a fairly steep learning curve. My primary interest is in downloading routes that I create in RideWithGPS which works very smoothly. Only missing feature is the ability to set the Odometer to a specific value but can be done with a ConnectIQ app that allows you to add a new field and supply a starting value.
I have been using my Garmin Edge 820 for about six weeks, including a trip in the Canadian Rockies. I have found the Edge 820 to be very accurate in the data that it provides (speed, distance, heart rate, elapse time, course, altitude), and very reliable. The battery life is better than my Edge 800. I do not usually answer my phone or respond to messages while I am riding, but the blue tooth connection to my smart phone is very convenient in telling me who is messaging or calling me, thus allowing me to answer or respond if I need to.
I may have reviewed this already but I don't see it and now I have been using it for about a month. I agree with people that say the touch screen is not something for Garmin to be proud of. It can take several taps to get it to respond. It, therefore, is not up to date in this technology. That said, it otherwise works extremely well. I am not sure it is worth the upgrade to a so-so touchpad from the button 520 model, but it is very good. The one thing to note is that the beeper (if you are using a Garmin Varia with it) is quite faint. Use the included handlebar mount and I can't hear it at all. However, use it with a 3rd party mount that is metal and open in the back and I can hear the beep every time. Another minor problem is how long it takes for the incline percent to measure correctly. Not that important but it should respond better. Overall, despite that, very happy with it. Also, there are many display options to make it better set up for you.
Moving up from my Garmin 500 to the Garmin 820 is night and day, I only have more pros than cons since I only had it only 2 months in use, but its definitely technology in the right direction.
If you're as tied into Garmin for your training needs like I am, then this is a great addition. The data and its integration with Garmin Connect and other sites is great. The only downside is the touchscreen is not that great. The 800 was better but the 800 doesn't integrate with Varia Vision
I upgraded from the Edge 500, which I've been using for years - mostly I was looking for map capability for taking off into the country to chart new territory.
This is a worthwhile investment - tons of available information, easy to program and easy to use.
The only complaint, minor as it may be, is battery life seems to be about 12 of the Edge 500. I understand the additional capabilities eat more juice, but I'm used to recharging every 12-15 ride hours...now battery is low after 6 hours of saddle time.
Other than that, it's got a great display and lots of features and options. I considered the Wahoo Elemnt Bolt, but I don't regret the decision to stick with Garmin.
Once set up properly, which took a bit of studying, the unit works fine. I like how easily the head unit is Integrated with the sensors. The software is so so in the user interface department, which is SLOW, for 2019, standard. This is really annoying, and distracting, when you are riding.
My biggest complaint has to do with the screen. It is basically as good as my Palm Pilot from about 2004! The color and resolution on the screen are not acceptable in todays standards. Garmin, for charging $400, you can do better than that.
The few times I was caught in the rain when I was riding the screen when crazy! The rain drops randomly changing my screens and settings. I guess I could have changed the touch sensitivity then but I was too busy to not cause a crash in the pace line.
My 820 is out of warranty now so I will be replacing it with one of their competitors when it dies.
I had a 510 that worked fine but I wanted to upgrade. The upgrades were the color touch screen, improved maps, and a few minor software things. The display is good, but essentially the same size as what I had. IMHO the 1000 is too big and the 510 is too small. The 800 seemed to be Goldilocks, but for some reason Garmin didn't stick with it.
I purchased the 820 to replace my 800 with map card. It is a little smaller and I like the new features like how it links to my iPhone. It came with an out front mount which was a nice touch. I like lots of data as I helps me focus on something other than how tired I am.
I previously owned a Garmin Edge 1000. I use the computer for training rides and racing - occasionally venturing out on long exploring rides. The map on the 820, although smaller, works just as well as the 1000 ever did. Sharp resolution. And the control buttons on the 820 are much more crisp and positive. I also prefer the smaller size.
I also have an old Edge 500 (bombproof!) and an Edge 1000. The new 820 has a longer battery life than the 1000. The navigation is of course not quite as visible, given the 820's smaller screen size, however, it still navigates well...even on dirt trails. They have improved the software, with the latest update allowing 3 different 'sensitivity' settings for the touch screen.
Upgraded from the Garmin 810 and I really leak the small unit. It fits much better onto my stem which I like better than the out front mounts. Touch screen is easy to use and once you've had Garmin units for a number of years, their functionality is simple to learn and use. Great product and a good price on Bike Tires Direct.
The elevation function using the satellites seems to have a lag in measuring your data compared to the Garmin 810. My wife's 520 usually has 600 additional feet of climbing on an average 3000 ft. day.
Traded up, finally, after years with the 500. Works well but with two minor quibbles. First, the screen is more difficult to see in bright light. And secondly, when wiping sweat droplets off the screen, I sometimes inadvertently change pages, which can then be difficult to swipe, especially on the fly. That alone makes me almost prefer buttons instead. A little pricey compared to competitors, but okay if you catch a sale.
Returned the Edge 520 go the Edge 820, both worked fine, however I wanted the touchscreen. This was an upgrade from the Edge 500.
Saving your data when paired to your cell phone is fast, getting you kudos from friends on Strava.
Im still figuring out all of the features it did cause an alert to my emergency contact when I stopped for an adjustment.
Love my Garmin.