I have had a 30" for a couple of weeks now at work. I work for an architect using CAD and so the extra space to see the drawing is really good, and the quality/brightness is by far the best I have seen.
BUT... the screen is soooo big, it takes a while to get use to. and you end up using it differently with your email program and browser window open at the same time. For day to day use at home or not where size matters I would say it is too big, I feel slightly overwhelmed by it. And the desk space it takes up, I hide my G5 behind it 🙂
Lovely screen, can me easy to mislay cursor 😛
Oh, friends and visitors are left speechless when they see it.
The only problem now is that my TV at home is only 28", so this is going to cost me big... 🙁