I only had one problem with my Topeak in the two years that I have owned it. A couple of weeks ago I accidentally stepped on the head and broke the lock handle. Well it was only a $20.00 US pump, I'll go get another one. Got to my LBS and they had a replacement head assembly, a better one than what came on the pump as it had a metal lock handle instead of plastic. Anyway, I'm sold on Topeak. Great price, easy to obtain spare parts, and dependability (at least 2 years and running). The only down side is that I have to use a little more muscle to pump tires to 120PSI. I can use the exercise.