I'm happy with mine.
I upgraded from a white 20" Intel G5 to the aluminium 24". The screen on the 24" is really beautiful in comparisson - much more vibrant colours. The only thing that bugs me slightly is that my old mac was so quiet I literally couldn't tell if it was switched on or off - no matter what I was running. The aluminium one does make some fan noise while it's on (not too distracting but still a bit annoying) and it can get quite hot to touch on the top.
I upgraded from a white 20" Intel G5 to the aluminium 24". The screen on the 24" is really beautiful in comparisson - much more vibrant colours. The only thing that bugs me slightly is that my old mac was so quiet I literally couldn't tell if it was switched on or off - no matter what I was running. The aluminium one does make some fan noise while it's on (not too distracting but still a bit annoying) and it can get quite hot to touch on the top.