I bought one. It was junk and I returned it. First use impression was that it was “fine”, although the speed settings appeared to do nothing. It ran at just one speed no matter what setting was selected. It also occasionally would kind of get stuck and not do anything until you pushed on the tool end a bit. On second use it was getting stuck a LOT, then randomly it would speed up even though the setting wasn’t being changed, then it started to get very HOT and emit an odor similar to very hot electronics. I turned it off, let it cool, boxed it up and contacted WOOT as I was not willing to continue use of something that seemed to be a little too willing to burst into flames.