I bought this set during an inspiring infomercial. I have had it for 8 years now and use it for general upper body tone. I think it has been worth it because it is much better than buying a gym membership. I can simply exercise when and how much I want to in the comfort of my own home, and the device can be stored beside my dresser in a small space. The movements are easy and you can set the resistance. I use this device twice a week on days I designate as exercise days. Having a routine and a device like this to do it with make exercise more likely to happen regularly for me, and the benefits to my health show. This is why I call this a worthwhile investment in myself. At my age of 54, my fitness goal of strength training is attainable with this device used twice a week for 30 minutes each. Performance Pretty good. I built up arm and chest strength and trimmed my waist a little, which was nice. but my main goal of keeping up muscle strength has been effectively maintained. Ease of Use Straightforward instructions, but patience is needed because at least for me, my first few attempts were hard because of my need to train up. I began only being able to do a few repetitions, but built up by sticking with it. I know when I have done enough because my muscles start to feel warm. I stop then so that I do not overdo the work. Durability Still good after 8 years. In fact, a second user is now benefiting from this device as well. I gave it to my husband, and he's working out at night with it. Design Very innovative resistance peg system to build strength. It is easy to use with handles for me to grip and a pleasing look overall. It also is easy to store by setting it upright alongside my dresser, and it takes up very little space. If I would change anything, it would be that the interchangeable resistance pegs cannot be stored within the device itself, but are separate, making it easy to lose them or at least misplace them.