I won't buy another version until the P4 rendering engine is as fast as it was with P4 and Pro Pack. Posers 5 and 6 both take twice as long ro render (and that's with the quick P4 rendering engine...I'm not even talking about Firefly - though I would expect that to take longer). Anything else - IMHO - is simply not an improvement if the base program runs like a slug. Sorry for the rant ;)