I have had 3 sets of resistance bands made by others, and the ones I have from BMP are simply the best by far. They are stronger, more durable and, most importantly, so much smoother is use. When I first got them (this one is just the strongest one that did not come with the 5 band set I bought last year), I noticed that they were shorter than any others I had used and was quite concerned. But, once I used them, I found the range of motion was the same and the smoothness of the motion was so superior that I can feel I am getting a much better workout.