Louis simmons mentioned these in his videos. They are the ones i personally use, although i am a bit biased because i am originally from youngstown, oh, and could just drive over and pick them up.
I can only speak for the jump stretch brand, because i have never used any other kind. never needed to. I have mini's all the way through super. They were used at my college for every sort of training imaginable. We beat the piss out of those things. I also had the pleasure of training with some world champion bench pressers, and the would use these to do de-loaded bench with a lot of weight. The original set i have are the green bands. They eventually (have had them for seven years now, and still in use) loose a little springiness ( sitll use the same set currently for when i do speed or de-loaded benching. Still are perfectly functional), but overall, are very durable. Cannot say anything bad about them, great investment. Will not be disappointed.