Our lovely receptionist was getting swamped with phone calls from customers asking, "what is the best power band for me?". Hardly a day went by when she wasn't getting a question about our bands. But there's really no easy way to answer that question. Because...
... power bands can be used for an entire range of exercises, rehabilitation, stretching and strength applications. There is no limit to how you can use them.
And, it also depends how you apply each band for your needs. While some people will use them traditionally, more adventurous athlethes like to double them up, loop 'em and rig them in a variety of ways. While others like to use the band handles and door jams. This gives you thousands of different combinations that will help you get what you're looking ...