Purchased these primarily for my wife to use. I ran them through the paces of doing some HIIT workouts, ranging from doing curls, lateral raises, and lunges to using them for unilateral work. The quality is good and I think this is a great starter set with a good reputation from Black Mountain. I like the fact that you can stack bands to increase resistance and that they are build on clips. The carry bag is pretty flimsy, so don't expect to use this for more than a stuff sack. Mine had the zipper break the second time I used it. Handles are good quality and their is a nice instruction sheet and reference guide for resistance. Black Mountain does offer a more robust set of bands, which I would recommend if you are an avid fitness person. I am and I abuse my gear. I will need the upgrade! This is also a lower price than I paid, so it's a better deal financially! Regardless, good product and the only change I would make is a better carry sack for taking these on the road.