Maxwiz, POTO has a very shallow rule set, its really about making ramp shots and achiveing multiball to get the jackpot. But it is a fast game and not that easy. The audio is a 9.5 out of 10 for me, and it compliments the artwork and general feel of the game. The lightshow is up there as well.
I find that i can totaly immerse myself in the dark atmosphere and dont really mind that the rules are a tad shallow.
Dont really know about collectability, approx 2750 made, so not that many compared to others. Its a pin i have wanted from day one, so i really enjoy owning it. As for it measuring up, unfortunatly i have to say no, the rule set lets it down. POTO had the potential to be a supurb pinball machine, but alas, it just sounds and looks great.
Mind you, there are many others that play a lot worse out there.