PAP could be a really great piece of software, but with cintiq users it has A LOT of problems. For me, the cursor was off alignment by a long way so I had to make a txt file to put it back in the right place, which works ok. But I cant click any of the buttons on the right side of the screen with the pen now, I have to put the pen down then use the mouse to click them. Problem is, all the tools you'll use quite often are on that side of the screen so it takes more effort to make a sequence then is really required.
Its great that its free now, but I hope these issues are resolved in future versions.