Summary: Only used computer 3 days and like it very much except it has the Sandy Bridge chipset flaw and the display can hardly be seen riding in the car. I probably won't be impacted by the flawed chipset so hesitate to return it but I would only recommend buying the revised motherboards with B3 stepping. I'm not sure how you could verify which version you are getting...mine appears to have been built Mar-11 but still used the flawed board.
Pros: Fast, Lightweight, Long Battery Life, Powerful, Quiet
Cons: B2 Stepping Chipset flaw, No backlit keyboard, Nonversatile display