I've had the Bodylastics for the past few years. They are the best. I've purchased a cheap set too....don't ever buy cheap bands, NOT worth it.
These bands appear to be every bit the same quality as the Bodylastics. My girlfriend got this exact set on sale . Even the lightest band here is almost too much for her, lol. Good thing I have easier bands to spare.
Resistance bands like these are as close to lifting weights as you can get. Not quite, but you can challenge yourself and get sore muscles with them.
Nothing wrong with this set. More money than others, but trust me, it's worth it.