LED therapy/Light therapy

So has anyone had the opportunity to try this? Infared LED therapy? My chiropractor used this on me years ago before I heard of it. Then I was watching a news show the other day and they featured this. I think he was a little ahead of the times. Anyway, it’s supposed to relieve tendonitis, and speed healing of certain things like wounds, etc. He put the pad on the areas of my leg that were bothering me.

I have the opportunity to borrow one for some minor tendonitis issues and will see what happens. I’m curious to hear if others have used this.