I just bought this and tried it last night. I'm on the fence because some of my nails look PERFECT but my thumb is bubbly. My guess is because I wasn't patient (I was in the middle of different projects) I didn't prep them enough. Meaning buffing. But I'm still new to this and the light is super easy to use. I hear that ppl are upset that you can only put four or less fingers under at a time but to get a manicure at home in under ten minutes, what do you expect?