I freelance part-time as a web developer, and needed a new monitor to go with my new rig - used primarily for work, but also for the occasional bit of gaming.
I purchased a U2410 from OCUK, but ended up returning it (DSR 7-Days) because it was lacking a "Work Order Number" (effectively making the warranty useless, as described elsewhere in this thread), seemed to have a green tint across the entire panel (although only I could see it and several friends thought I was going mad) and found I was constantly fighting with the settings to get the monitor useable without either straining or squinting my eyes (the sharpness/focus just seemed 'off').
Before returning it, I picked up another U2410 from another supplier, and ran the two side by side. Both screens are Czech, and from the August 2009 batch. I could definately notice a difference - the second monitor does not suffer from the green tint or the 'straining eye' problems experienced on the original unit, and came complete with the Work Order Number on the packaging.
I have to say, this second unit is a fantastic monitor, and I am very happy with it - to the extent that I am considering buying another. Compared to the rubbish 22" Iiyama I use in the office (in the other half of my time) it just screams quality, and is honestly a pleasure to use. The colours do seem 'cooler' when compared to my laptop display, but I am willing to put that down to accuracy and the quality of the monitor (£450 monitor vs. £600 laptop...), and whilst I did have a slight green/pink issue, it was barely noticeable across a plain white background and seems to have become less noticable with time. Had I not looked for it, I would probably not have seen it! Neither U2410 I have had has suffered from dead or stuck pixels (I expect most of these are panel lottery refurbs on warranty claims?), and I have noticed no noticable input lag in games. My only real gripe is the slight 'dirty window' effect on light backgrounds (that people have complained about elsewhere) when you get close to the screen, caused by the anti-glare coating.
IMO, if you are looking for a perfect monitor, good luck! The U2410 is certainly not perfect, but what monitor is? If you are looking for a monitor with good colour accuracy, good for games and film, good for work and good for web, the U2410 fits the bill - and at a price that is (for an IPS monitor) altogether quite reasonable.