I am waiting on my parts from China now to build one, going to give it a shot. I can't wait!!!
This video shows some more, starts getting good at about 1:30
I really want to get into this!!! The P2 will be for video and one of these puppies will be for fun. I would probably go with a Luminer QAV250, Blackout H, or wait for the TBS Gemini which is a all in one package. It looks like a tone of fun, but alot of practice/crash flying to do!!! It would be cool to build one and put in a receiver you could use your P2 TX with so you would only have one TX.