It does what it promises. You can do 23 different sets and exercise 4 different muscle groups. It really does a great job and so far it holds up. The only downside is that the brochure doesn't have any instructions with the exercises you can do and you will have to figure it out on your own. You should create something like a diagram to keep track of which exercise you have done because otherwise you lose track. Anyway, I recommend it because it really gives you a good workout.