I got the Tanda System 6 days ago and have used the blue light twice daily following the instructions exactly. I am 30 years old and have had problems with acne all my life. The acne got worse about a year ago when I went on birth control. I tried everything! Proactive, saw a dermatologist who prescribed different Duac, and antibitics nothing worked. The last 7 days has been a miracle. The entire texture of my skin has changed since day. Fewer blackheads and no new pimples. The ones I had were pretty big and are healing much faster then I expected. This is the 1st time since I can remember that I can touch my face and not feel it textured by bumps. I can't wait to see what will happen to my skin with continued use. THIS IS THE BEST PRODUCT I'VE EVER USED AND WELL WORTH THE MONEY.