I bought one a few months ago and it had an annoying jittery problem. After researching the problem through google, the only way to solve it was to return it to the manufacturer to get a firmware update (like the Dell 2007wfp rev00's). U might luck out and get an already updated one, but I believe this problem has been going on for quite some time and because it's a smaller company, they aren't as forgiving in recalling and patching them all up. I ultimately decided to return it and wait for a deal on a dell.
It was most noticeable with my cursor movement on a dark background; it was like the refresh rate was <25. It's also noticeable after the monitor warms up, not noticeable the ~first hour, where there are vibrating or jittery pixels. THIS WAS ON A VGA CONNECTION THOUGH. I connected to DVI and the pixel problem was gone, but my cursor still wasn't as smooth as it should. If I connected it straight to DVI though, I probably wouldn't have noticed.
But, if u want it to work like it should, u should to be ready to RMA it. U should be able to find out which version numbers have the defect (I think I found it on some forum through google).