I wish I had a definative answer for you. The science behind all these products is sketchy.  And, it's hard to know if their before and afters are real  - not retouched.  None of them did controlled trials in real humans that compared different technologies or did split face studies in a reasonable number of patients. I think the jury is still out but if I really wanted to try one, I'd purchase the Omnilux.  I'm thinking when I get back from vacation, we'll purchase several of these and test them in my office.  Dr. I