I had the 19" version, 1908WFP, for a few days. I returned it because the backlight hums even at 100% brightness and it ghosted pretty badly in Battlefield 2. The 19" version advertises a 5ms response time and a 1000:1 contrast ratio.
This one advertises 2000:1 (dynamic) and 2ms (Gray-to-Gray). Sounds like a Samsung panel, and $318 is quite a bit for a 22" monitor. Why not just get the Samsung 2206BW?
Dell does have a great warranty, which is reason enough for some people to choose them.