I bought this with my new retina MBP. The software does NOT work. Constantly stops working. Even trashing the preferences, still need to reboot to get both the pen and the gestures to work. Called Wacom, they said they are working on an upgrade to the software. In the meantime, the tablet is worthless so it is back in the box, ready to go back to Apple.
Wait till Apple builds one. This company is flaky.