So I'm an old guy (72) been riding and racing since I was a teen. So for quite a while anyway. These are the first TPU tubes I've ever run on my bikes. I like them, it's only been a couple months but they're lighter and I think maybe roll faster than butyl tubes. I've had no flats and no problems with the valve stems working with the stem extenders my wheels require. I'd recommend them.
I've been riding Conti's for about 10 years now; clinchers with tubes. I got occasional flats but, and it may be luck, haven't had a flat now for almost 3 years and 7K miles. It may be that going to wider tires (I'm now on 30's) and lower tire pressures (now at 60 & 65) result in fewer flats? Conti's have a reputation for being hard to mount. This was true on my 21mm internal alloy wheels. But, I am able to mount the 30's on Vision carbon wheels using only my hands. So, it seems the right combination of wheel and tire make a difference. I got about 3K on size 25mm but am getting more than that since upsizing. They roll nicely on the Vision wheels with Silca TPU tubes; low rolling resistance and reliable combo.
I commute regularly between Ashland and Medford on my trusty 80's-era Eddy Merckx. I hate having to deal with flats, especially if I have a time deadline. I've used the Gatorskins for years, and have found
them to be fairly sturdy, even if not bombproof. Also, I've noticed a couple of minI-pits developing on one of my newer tires, something I haven't seen before. I'll have to see if these become a problem.
Any tire can get a puncture. However, these tires wear well, and are resistant to punctures.
A few years ago a group of us rode from Delaware to Florida, a three week trip. The people in the group running these tires had few flats than the rest of us. That was in 2017, ever since i been running these, and haven't had many flats. Some seasons (avg 5000 miles a year) none.
