As someone who recently bought two of he new rMBs, threads like this always scare me a bit. But the look, feel, and surprising power of these things was too hard for me to ignore. Bought one for the woman, and then one for myself (she got tired of me stealing hers). So far, they've performed beyond our expectations.
Having said that, I tend to buy Applecare. This has paid for itself repeatedly, throughout the years. Yeah, it costs a bit, but I know that my keyboards, batts, etc will be solid for three years. Stuff breaks, it just happens.
Typing this on a late 2012 iMac 27 with a stand that just up and broke. Glad it's still covered under Applecare. Even fixing that thing would have cost a fortune.