I was a bit skeptical about exercise bands having never tried them. But my trainer at the YMCA thought it would be a good change along with my dumbbell set at home. So I read a lot of product reviews and these were rated highly by people. I like them. I printed off a ton of exercises my trainer gave me and am learning how to do each one. I do wonder if the bands couldn't be longer as the set at my YMCA is considerably so but I guess I get the same workout. I am still playing around with what color (or weight resistance) to use for each exercise. And if I travel on vacation I can take them with me which is cool. So far I have had absolutely no problem with any of the bands - they all seem to be high quality and durable. Let's see where I stand 2 months from now.