Surprisingly effective!
I wasn't sure this would do much but I sprained my MCL and I figured I would use this for mostly immobilizing the knee. I figured if I have it on I might as well test to see if it did anything and surprise, surprise it has lessened the pain with each use. My guess is it is due to increasing circulation to the knee, but who knows, maybe it's just a placebo. In any case,  I am happy with the results and will continue using it.
Rating: 5 stars