I am very pleased with the quality of the pictures and the fact that I can crop them up to 50% and still have a respectable pixel count.

Let's consider that the camera body cost around $2100.00 I'm thinking I've saved a bundle in the cost of purchasing new glass because I can slap on any old Nikon AF or MF lens and the camera work well enough to take quality pictures with an added bonus of a digital full frame sensor and more bells and whistles then I'll ever remember to use at one shoot.

Rather than rehash the technical features, I'll summarize in saying that the gorgeous big viewfinder (compared to a DX format SLR) makes all the difference in the world.

The biggest adjustment shooting on the D600 is: the FX sensor allows you to get more accurate and wider coverage in viewfinder(no more cropped images like my 300s, what you see is what you get now) and the 39 focus points is accurate and fast but seem to be crowded mainly in the center (my 51 focus points on my D300s covered more area).