I was involved in a test group for the Laser Comb prior to FDA approval over 8 years ago. I've used the comb over the years and continue to show good results. I am wondering if the basic technology of the comb from back then is still on par with the comb today. In other words, is the current line-up of combs any different, in terms of efficacy and technology, from the ones in the early 90's?