It is fast, but it seems to have some problems with Facebook though. Especially the photo albums.
Whatever happens I think it will influence other browsers to be better. I like that it has independent processes so that one problem doesn’t stall the whole browser. But I’ve noticed some lag in the interface here too.
Its (a little) harder to figure out how much memory its using up in total. It will be great to see which sites are the hogs that slow everything down too. Adding its own process/memory display might be overkill to some, and called bloat. I think its pretty nifty. I like the “stats for nerds” button.