well, tested:
https://www.strava.com/activities/288506620
got one flat tire, and forgot my water bottle in the car
so, the final opinion? Meh! Didn't find it was any better. Will keep my bike fixed
BUT, at least I could test my DIY prison looking tool for wheel nut removal, and it works like a charm. Also, remembered how bad it is to pump a road tire with a small pump....