I think it is worth it. The interface is the best yet. Everything seems to run a bit faster. The flick scrolling is money!! Threaded SMS is great! The battery/power management is like no other build, I'm starting to wonder if the battery meter is even working...it lasts forever. Facebook does not work but there's a mobile site for that. All of my usual apps still work, Ubertwitter, google maps, storm slider, quicklaunch, berryweather, and AIM is actually working now (did not in .150). The only things I've lost is the camera, which I never use (could be used as a fast reboot utility currently), and I'm sure it will return soon. Gmail app doesn't work but the new build has the gmail expanded tools mixed in. Nothing lost there.
I would say anyone that can do without the camera for a short while should install this OS to get excited about what your Blackberry is about to become...it's like a dangled carrot preview...LMAO!!