I have a 23 incher. Perfect size, excellent colours. Nice design. Great and overpriced display, and slightly outdated concerning inputs. Yet highly recommended.
My display seems to have an odd grainly coating. The grainy stuff is static, and can easily be seen when I move windows around, particularly if the windows contain light colours. I've seen this on other ACDs too, so it might be normal. It really is visible only if I focus on it.
The inputs: I use mine for a couple of iPods, an external iSight (FW), and the alu keyboard.