Easy to use and high rating for versatility. The product holds up great during long work out sessions. The fact that the resistance bands are stack-able is awesome. I can set the resistance level between 2-4lbs up to 75lbs. The door anchor and comfortable ankle strap add a lot of variety to my work out that I didn't have before. Hand grips are comfortable as well. Instruction and exercise example booklet are helpful and easy to follow. I wish there would have been exercise examples for the leg muscles, though. However, a quick google search and I was good to go. There were some stray strings on the handles but other than that, there were no issues. I called the owner with a few questions. He was easy to reach both times, kind and professional. Great company and great products. Highly recommend.