Pros: No ghosting, no input lag, no dead or stuck pixels, no backlight bleeding, anti-glare coating works, great colors
Cons: Anti-glare coating can make the screen look somewhat grainy with white backgrounds
At first I had been hesitant to buy an IPS monitor for gaming because of all the input lag and ghosting issues I've read some IPS panels have, but because of the popularity of the U2311H here on OCN and some reviews I read stating that this monitor had exceptionally low input lag for an IPS panel, I decided to go ahead and give it a try. I have played many of the recent big title games (BF3, Skyrim, Mass Effect 3...), and have noticed neither ghosting nor input lag of any kind. I even tried hooking up my PS3 and playing a lot of GT5 to see if I could noticed any ghosting while the scenery in game was flying by my car, but again I did not notice any.
The colors on this monitor look great. Maybe not as good as a more expensive IPS panel, but definitely a significant upgrade over the previous TN panel monitor I owned. This is a matte display, so the colors won't seem as bright as a glossy one, but they are plenty bright enough for my personal taste. Additionally, the anti-glare coating definitely does it's job. When the sun is shining down on my monitor during the early afternoon I can still easily see everything on my screen. The one gripe I had with the anti-glare coating when I first got the monitor was that it made the screen look noticeably grainy when I was viewing webpages that had a white background, but I soon stopped noticing it unless I was looking for it. This graininess is never noticeable to me while gaming or watching a movie, and again, I now only see it if I consciously focus my eyes on the coating as opposed to the image while having something with a white background open, such as a word document.
In terms of functionality the monitor is both height and tilt adjustable, which comes in handy. It can also be rotated a full 90 degrees, which is great for multi-monitor setups as well as viewing images that are portrait as opposed to landscape. The monitor also has extremely good viewing angles, so watching a video or tv show with multiple people is no problem.
In conclusion, this is a great monitor and I am extremely happy with my purchase. Personally, 23 inches is the perfect size monitor for my setup, but if you desire something bigger I would suggest looking into the larger versions in the Dell Ultrasharp IPS line, although these seem to have more noticeable input lag. In my opinion, the only reasons not to buy this monitor would be if you prefer glossy to matte displays or if you hate anti-glare coating. I prefer not having to close my blinds during the afternoon to use my monitor and not seeing my reflection while watching a dark scene in a movie, and while the anti-glare coating bothered me at first while viewing white backgrounds, I don't notice it anymore. However, everyone has their preferences.