Always wait and let the early adopters discover any problems.
+1! That's my philosophy exactly.
My experience with 4Sevens products has been poor overall, particularly with tint issues. I bought three of their HCRI lights late last Fall and they have a great tint, but I have to say that's the exception and not the rule from what I've experienced with them.
I don't find anything about the P0 to be compelling either, so have no intention of buying one. I've been mulling another HCRI Preon model, but that would be absolutely my last 4Sevens light.