The most important and integral part of the recovery process post a joint surgery is a good,stable and effective therapy system. I am glad I got one. Post my ankle surgery, I have used this unit and I really got benefited. It is not at all bulky,noisy and uncomfortable like a traditional cooler. Infact it is quite,easy to handle and very comfortable to use. The cooling effect not just heals the post operative trauma but also speeds up the recovery process. A worth buying product post surgery.