JB is awesome. It prioritizes user input over running tasks (what they call butter) and really is more snappy and responsive. The only reason I'm not using Directory index · styled with h5ai right now is because I have to have the camera working.
Saying something sucks based on 1 persons bad experience with an experimental ROM seems a bit of a jump. lol That forum keeps getting hacked (someone angered someone? I dunno.) so there isn't a support thread anymore (as of yet) and last I heard Dhacker29 stopped working on it until he finishes his CM9 builds.
You HAVE to used safestrap with this, he says he doesn't know how/if it will work with bootstrap. Last time I installed it I came from CM9, flashed this, rebooted completely, since camera didn't work figured I'd restore data for poops and giggles and it worked. Rebooted to all my apps/data. lol
Sorry to ramble.