After a knee replacement I used an ice machine and CPM. Insurance didn’t cover all of it but the rental I paid was reasonable and worth every penny. I don’t know what I would have done without them except take twice as many pain meds. Whenever I had a question, Madison gave me prompt answers. The equipment was delivered to my home, set up and I was given very clear instructions on their use. There were also online instructions but I never had to use them because of the good explanation I was given in person. Don’t go though a knee replacement without these machines. They make recovery so much more comfortable.