I use Surface (2 of them) at home so I'm used to the precision of these pens. I have a small HP that I'm married to at work. My Fingers don't work all the time and hit the mark exactly so I decided to try this pen VERY accurate, lasts over 3 weeks on one charge 1. It's long and slippery so I kept dropping it.. This was attached with a little sports tape around the part I hold 2. The tip that slips off to charge is held in place by a weak magnet but I expect to lose it in the next few months it won't interfere with using the stylus, it's annoying (yes I'm picky) Still I would buy it again!