The first thing I noticed is how much more of your body you have to use to perform otherwise simple exercises such as curls or triceps pull-downs.
Pancaking the FitDisc between your hands really took a toll on parts of the body I did not expect. Curls actually made my chest sore and pull-downs really hit my rear shoulders. Very effective when you find a controllable resistance weight that your hands can support.
Tested it with heavier weight, but the weak link was my hands being able to hold onto it. Gloves help, but it seems best suited for high repetition workouts with lower weight. Highly recommended for quality and functionality. However, big weight pushers might find this product less useful. Still worth the price if you’re looking for something different that actually gives you a great workout.