The past 3 betas haven't been for me (I'm not a developer, so maybe there not for me anyway, but I don't give a toss *big smile*), iv found them slow, sluggish, unresponsive and very crash prone. THIS beta however, wow. It's blazing fast, the photos app is now completely stable (I can now scroll through my thousands of photos quickly!) and battery life seems to be perfect. So glad the beta was delayed due the hacking, I don't think it would of been this smooth otherwise. I can safely start to use this as my main os now. Finally!