Fantastic - I love how simple it is. I was (am) a P2K fan and was really impressed with the whole swappable playfield idea. It's not exactly a simple swap though. Heighway Pinball is very similar to P2K in that it's still a full playfield swap - possibly lighter and more advanced but still fairly involved process.

It never ceases to amaze me how far the P3 has come - as far as innovation goes there is nothing out there that even comes close.