Over the years there have been a lot of products that promise to transform the way you work. PDAs, operating systems, smart phones... they all disappoint. This doesn't. You can have 3 different documents open at once, more if it's plugged into a laptop or you use a 2nd screen (I used 2 cinema screens for a bit: you could see the lights dim all down the street when I booted my rig up in the morning).
I get sooo much more done, so much more quickly now. And it's just a pleasure to sit in front of. Every morning I sit down to work and I just smiiiile.
Using a 30" is completely different to using, say, two 20" monitors. Everything is in the same place, you're not constantly looking at a central bar.
If there's one concern it's eye strain. You have to be careful not to stare on it for hours on end. Take regular screen breaks, kids. You only get one pair of eyes.
This is the best piece of technology I've ever bought, and I've bought a lot. Whether you're into graphics-heavy work or not, it will transform the way you work... for the better.