Review (5/5): Do it. Buy the thing.
Love it! I do my own acrylics at home, and, since I'm not gifted with my left hand, the acrylics on my right always look pretty uneven. I wasn't the most fond of spending the time filing them with a hand file, so I purchased this! It works great and cuts down my filing time immensely! For $12, this is pretty dang worth it.