I just installed dp4 on my 2011 MBP. Seems to be working pretty well so far, except battery life is pretty rough. After a full charge with hardly nothing running it shows 2:30 instead of the normal 7. I left spotlight do all it indexing, and nothing is really using any cpu cycles. I know its just a beta, so I can't expect everything to work perfect, but I just wanted to make sure I wasn't missing something basic.