Powerbook 15 inch Aluminum 1.25ghz G4, bought August 2003
Serviced October 2003 for known issue with the LCD. White pressure spots appeared on the LCD due to an assembly issue. Problem shown to local Apple reseller, next say they had a screen in stock and replaced it. Total time I was without the system, 20 minutes while they swapped the screen.
Serviced July 2005. Problem appeared to be a bad hard drive, as data was being corrupted and the system log reported DMA errors. Serviced at the same reseller, took them 15 minutes to swap the drive. Reloaded OS from my own backup, noticed DMA errors coming back after two days. Reseller then ran extensive diagnostics on it, could not find a fault. Was without the system overnight for that. Got the system back, discovered the World of Warcraft installer would trigger the DMA fault every time, showed reseller this, they then took the system in for repair again. 3 days later reseller had repaired the issue by replacing the logic board, verified good with my World of Warcraft CD. No cost to me due to Applecare coverage.
While the above may seem major, I appreciated overall how well things have been handled. The system has been through a lot, including being carried to work on a daily basis and always with me when traveling. It's probably been on and running 80% of the time, and compared to other systems under similar loads, has shown less problems.
It's now waiting to be replaced by a shiny new Powerbook sometime next year. It all depends on when my wallet burns a hole in my pants, and when the Intel based systems ship.