I purchased this because during the summer months I am very athletic, and wear a lot of foot revealing shoes, so my callouses, are not very flattering, and I saw that this had various callous attachments. I purchased it one because Revlon is a very reputable name, second the price was amazing compared to the mani/pedi sets I saw at other salon stores. Well, here is the downfall, its made kinda like a Barbie toy, pink and plastic. This takes forever to charge, and doesn't stay charged for long, and no you can't use it while it's plugged in and that drives me nuts! I do have to admit I do have super soft feet now after about an hour of work and trial and error of different tools. It does do the trick but I don't see this being one of those products that will last many years, because it is just so cheaply made.