Mine is pretty damn flawless. A couple of slightly slanted F keys. I can move my battery cover around ever so slightly but is definitely not loose. Also, the inability to practically click on the higher parts of the trackpad. Mind you I think it's getting better as I use it.
Another odd thing I noticed is that if I push on the top of the computer, near the white illuminated apple logo, the whole top part flexes. I'm curious to know if the computer was designed that way or if mine is wrong. It doesn't bother me much other that the flexing, over time COULD, quite unlikely, lead to failure of the aluminium top.
Oh well, no firewire and 1300 bucks less in pockets are also things I decided I could live with.
Very satisfied with the product.