I assume most people buy this for overweight arm strengthening. At 2 lbs it is a little heavy. If you are using it for this, then pay close attention to their form and reps. I have found with limited reps focued on form their have been definite arm strength improvements. My players really enjoy throwing it lightly early in their warm ups. The ball comes flying out of their hands the rest of their session.The biggest surprise and this is even more beneficial for my WR. I throw it mostly underhand but the ball comes in with a load. your are better off catching this in your hands than your body. Which is exactly what we are trying to train WR transitioning from body catching to hands catching. It also teaches them how to receive the ball rather than stiff hand it. If you Stiff hand the ball it actually hurts a little. I have found the ball is really strengthening their hands and arms. The regular football no longer longer beats them up. They are all catching the regular ball even better. The more advanced players can receive over the top throws, but it has quite a load. I love throwing this ball at an adult who doesn't realize its overweight. The reaction on their face is priceless.This ball is great. The exterior is super thick and I can't imagine it breaking down any time soon.