Review (2/5): A decent drill...while it works
I bought this to file down acrylic nails I was doing on myself with dual nail forms (which I don't recommend if you have high c-curve nails, by the way). At first I had to watch a video to figure out to put on the bits, but once I got the hang of it, it was quick and easy. To turn it on, there's a little wheel towards the bottom of the drill where you can control the speed. It worked well enough for filling, though I mostly used the barrel bit for buffing and the sanding for taking down length. The other tapered bits weren't too useful, they didn't work well for filing underneath the nail. Overall, compared to a professional drill I'm sure this is much slower, but also much safer.
That was about 8 months ago, and since then I've used it about 10 times. I used it one more time for acrylics and the rest of the time to (very gently and slowly) file off top coat from gel nails for easier removal. Just a couple of days ago while doing the latter, the drill wouldn't turn on. I moved it around, and it would start and stop in short bursts as I would move it around trying to use it. That means the adapter cord is already damaged, which is ridiculous considering how little use I got out of it. For this reason I'm taking off three stars, no product should being to fail so quickly. Look elsewhere for a drill, unless you don't mind dealing with a faulty adapter.