As one of the backers on the original kickstarter - this is a pretty cool device, but don't expect it to just work out of the box. The surface you put it on has a huge effect on how well it works, and I've never really gotten it to be super accurate. Admittedly, I also haven't put all that much time into getting it to work, so I'm sure it can be done - just expect to have to do some finagling.