This works just fine. The Garmin goes on easily and it feels secure. It was easy to attach the mount to the handlebar. FYI, I had to buy this for my Edge Explore. The Explore wouldn't fit with my handlebars and the stem when using the standard size mount. That is, this isn't just for the 1030.
I needed a longer mount to fit my new Garmin 1030 Plus and this works. It holds the computer snugly and securely. I use the tether because it's there but the unit has never come off the mount so the tether is really not necessary.
I like that this version mounts on the left side of the stem which leaves room on the right side for other gadgets, being right-handed. Have tried other copies and none hold my Garmin as well. I tried to use with flat bars but the base of this mount is a little too wide to fit on the small amount of round bar next to the stem. I also think that it is an overpriced piece of plastic at $30 - hence 4 stars.
This mount is well designed to hold a Garmin head unit steady and safe. Use it for a 1030 and fits nicely. Through many potholes and sharp bumps and mount doesn't move a mm. Latest version is compatible with other Garmin accessories like the battery power pack. Now you don't have to swap out the 1/4 turn hardware as it's already in place.
This mount replaced the Garmin double mount that came with the Garmin Varia UT 800 light. That mount placed the 1030 much too high but this mount places the computer much lower more in line with the bars. It also accepts the Varia light.
Purchased this mount when I purchased the UT800 Headlight. It's a bit clumsy to use (not sure if it's the mount or the quarter turn adapter that comes with the headlight) but looks good with the overunder design. The issue is after only six ride my headlight when skidding across the road. After retrieving the unit I noticed the Mount had one of the ears broken off. This is the same issue I had with the original Edge 500 head unit. I contacted Garmin and the replaced both the mount and the quarter turn adapter. Fingers crossed it was an isolated occurrence.
Unfortunately, the 1031 has onofflap buttons mounted on bottom side edge rather than on the top face, so you need clearance between stembars and the bottom edge to hit the buttons. This has about 14 more clearance than any 1000 mount so lets you do that (barely). I found impossible to hit the buttons on a 1000 mount. I anticipate that it will be impossible to hit the buttons with full finger winter gloves even with this mount. Incredibly lousy button design by Garmin.