Bought my 20in als iMac in May 2005. Also bought Applecare. In the first year, the midplane and superdrive went. After the first year (thank you applecare), the HD went, followed by the Powersupply, 3 times. About 2 weeks ago, it started with the unexpected shutdowns, which had been the indication of powersupply failure, the last 2 times. On Friday last, it accelerated the shutdowns. The longest it was up was 14 minutes (it took superduper 12 minutes to finish a smart clone, I got lucky!). By midmorning, it wasn't staying on through bootup. I made a genius bar appt for the afternoon. The genius powered it up (it booted flawlessly of course, and ran the whole hour we talked, I hate technology...), pulled up the history, asked me some questions, and told me I had a couple of options: 1-they could repair it again 2-they could give me a brand new, comparable machine. I thought about it for a while and asked for the repair, because no one in their right mind would want a brand new computer. Not. Then he says, "you know, if you want to pay the difference, we could upgrade you to the 24in imac. I thought about that for a while and said no, cuz no one in their right mind would want a bigger screen. I mean, all that extra desk space taken up, and then the issues of trying to find the cursor on that big ol' LCD... Make a long story short, my new 24in imac arrives next week and I forgive Apple for all the evil things I said about my 20in.