I love tinkering with machines, so if this big guy ever needs some work, I'll be happy to do it; for now, the iMac is 100% functional with no signs of trouble. I am amazed at how much faster it is than my old G4. Both iMacs are the first run of their models; the G4 is a 15" 800MHz, while the G5 is a 20" 1.8GHz. The G5 has replaced the G4 on my desk as my third screen and main PowerPC machine; it is significantly faster, holds double the RAM, and has a massive screen compared to the G4. Plus, it's officially supported by Leopard, so it can happily run it without many of the graphical hiccups that the G4 had. I'll keep the G4 around; I agree, the thing is absolutely adorable. But for my needs, the G5 beats it hands down. Besides, it fits in a bit better with the overall look of the stuff on my desk; aside from the thin keyboards, it all looks very 2005tastic.