I gave this product an average instead of good simply because the head came broken. I have been using it for a few weeks and it sounded like a freight train. I contacted Tanda customer service and they said that the problem is the head and that they would be happy to send me another one once I sent the broken head back. I contacted Overstock and they no longer have this is stock and are in the process of trying to resolve the issue. Other than that, the product is great and I do see a reduction in fine lines in the 2 weeks I have been using it. It is time consuming and I use it every day. About an hour to treat the entire face. But this can be done while watching TV or reading unless you have a broken head then you can hear anything. I hope to get this fixed as soon as possible because I do see a difference in my skin.