It's tricky to review as I had 3 or 4 different people share the job of my nails.
My nails were buffed so thinly with the machine that, even with the layers of gel/shellac,they are weak and floppy. The polish is the thinnest layer(s) I've experienced and has started to come off within only a week.
My nails are so thin that they are splitting and breaking even with the reinforcement of the polish.