Did not like the product. You need to constantly clean the tiny file on the machine, in order for it to make your nails shiny. The layer of nail that is rubbed off, gets into the nano file. You then need to wash the nano file. So for 10 nails you might need to wash 20 times or more. Using a big manual nano file is faster than this machine. Also the machine makes scratches, and manually you have less risk of scratches. The tiny manual nano file has been great, but if I would have known, I would have bought only that manual file. All in all, I am very disappointed and feel cheated.