I received my rMBP 2 days ago, and in those days I've already had a kernel panic (seems resolved?) and 4 or 5 freezes at start up/login/shut down/restart. As a result, so far I've not been happy with the out-of-the-box experience. I've owned macs, but this is the first one I've had any issues with right away. This is disconcerting to me. Is it worth exchanging it for another one? Anyone else with similar issues running ML...what did you do?