Smart Arms is inexpensive and lightweight. It travels well and fits in a suitcase, not all hotels and motels have a workout center. This might not be stout enough for a younger weight lifter type but I am 63 and when there is no gym available then a brisk walk and a round of exercises with Smart Arms gets the job done. 35 reps of each exercise give the arms a good workout, do more reps if needed to get that warm well worked feeling. Performance Under the above described circumstances this is a great machine or gadget. Ease of Use Easy to use and carry on the road. Durability It is flimsy but I think it will last. It is not designed to take a beating. If it lasts 6 months it will be worth the money. Design Easier to use than resistance bands and the center piece makes it stable and more usable.