Good! Sufficient intensity, I bought it because my feet have been hurting lately, the intensity is from left to right or vice versa, as if your foot is being kneaded, there is no intensity on the bottom of the foot, I also put my calves on it, I remove one star because I can't find where it closes because it stops on its own but a light still stays on, and I put it in the end and take it out of the socket