I was attracted to the suggestion that red light therapy increases skin collagen production. I still can't say for certain if I've noticed a lasting difference in my skin, though my skin is already in pretty good shape. I do notice though, that after every session, my skin does look and feel refreshed and healthy. The biggest change I notice, is just in my overall mood, especially given the gray Midwest winter and spring gloom. This could be from the lights, it could also be from sitting down and doing nothing but breathing for a bit. Either way, I do feel good, and look good after a session.