These Conti inner tubes are as reliable as any brand and are available in 60mm stem length. Not all 60mm stems are as long as these. For instance, I bought a 60mm OTC Bontrager inner tube at my LBS, but the stem was too short for my 52mm rim height wheels. So I was unable to get a tire pump on the stem to pump up the tire. Additionally, I am happy that the Conti has a removable core, which allows it to be removed and inserted in a stem extender. The Conti inner tubes seem to hold air well and need very little topping off after two days. But, they will flat just like any other inner tube.
These tubes always prove to be reliable and lightweight. I would recommend something thickerheftier for rough roads or serious commuting, but that's only because that use isn't really what these tubes are intended for.
I used to buy the cheapest tubes but after buying these a few years ago I never looked back. For my type of road riding (back country road), they hold up better than what I used in the past. I highly recommend these tubes over others.
I purchased the long stem tubes. The tubes are high quality and fit well into the well of the tire. The valve insert will come out if your pump grips it as mine did. I finally put an adapter on the valve stem and that seemed to do the trick - not ideal if you have to change a flat on the side of the road.
This is a super lightweight tube with really thin walls. I tore it on the install so I cannot review its durability if one were to succeed in installing it. I will say that I have installed plenty of other tubes without incident, so while it could have just been bad luck, I'm sure this was not the first time I've caught some of a tube with my tire lever. I won't be trying again with this tube.
Not much to say, it is a bicycle tube. It is not puncture proof and won't prevent a pinch flat if you don't install it properly. All that being said, it is a very good tube and a good value for the money. I carry an extra one and when I get a flat I check to make sure what caused it is still not in the tire, put the new tube in, inflate it and continue with my ride. I have NEVER had a problem with one of these that was quality related so that's a big plus to me.