I am using VRBLK1 leak that came out on Nov 15th or so. I rooted with debugfs (sp) had superuser and ezunlock installed and flashed the rom with Odin. After installing, everything works smooth and fast. Battery doesn't seem to be any better..might be a little worse. The weird thing is I lost root access...I've tried several times to re-root but I get failures concerning permissions. I'm way too much a newbie at this to really know what I'm talking about! As far as the OS goes..it's really good.