It's still awful. It tears badly, and if you enable the "tear-free desktop" option, then you get lag that makes the desktop feel like it floats. I mean the kind of lag/latency you get when playing Doom 3 with VSync and triple buffering on. Everything you do needs a few milliseconds to show on screen. Makes typing text a bit frustrating. Or when you move windows, you see the mouse pointer move to where you tell it to but the window itself only follows later.
These people don't know how to write Linux drivers, period.