I bought a 2.6/16/512 rMBP (with Samsung panel) around Christmas time along with a Thunderbolt 27" Display. The unit seems ok (a bit unstable sometimes) but I think that may be Chrome and/or Adobe Flash related-I'm still troubleshooting that issue and some lag with Mission Control even on 10.8.3 and running on the discreet card. Anyway, why do I feel like a sucker sometimes for buying this? All I read on the Internet is problem after problem and people complaining all the time. Now, I know you usually don't hear to much from people who have no complaints but still, there does seem to be a high degree of issues with this unit being reported on.