My experience with Apple service has always been exactly mundane as it should be. I turn up and show them the device -- no receipts or other documentation -- and 2 minutes later, they tell me it'll be repaired by tomorrow under warranty.

I recently tried to get service for an Acer netbook power supply that just fell apart, and ended up being told that they couldn't be sure I hadn't broken it deliberately, I'd have to send everything (PSU and netbook) back to them, and then they'd decide whether I was going to be charged. Worlds apart.