Review (4/5): Only lasts about a year, but great for the price.
This nail drill is very inexpensive, so obviously it's not going to last forever. I've bought this nail drill about once a year for the last 3 years and I've gotten tons of use out of each one. But just be prepared to replace it once a year. If you want one that lasts forever, you're going to have to spend a few hundred dollars.