My Mrs has the z, good laptop, but I've noticed light bleed on the bottom and top and a not so good viewing angle, but straight on the screen is very nice. This is a 2011 model so not sure about the latest. Although last I heard is that Sony is discontinuing the Z, not sure if true though.
it is, and that was really the only competitor to the RMBP. Sony is having problems to put win 8 in it with the PMD. They are going to axe the Z and focus on a more popular S line, it makes sense for the company, but we are losing the sony cutting edge.
I had the 2011 model, its the same as 2012 without the cpu off course. You should have send the model back, there wasnt any light bleed on mine, but the viewing angles is due to the TN panel, its still extremely rich in terms of color accuracy and reproduction.