As a person who has migrated from the Canon crop system to D600, I found some of these features annoying.
1) position of ISO button on the body, awkward to change ISO while holding camera up to the eye, since its located at the bottom left corner of the body,
2) cant adjust exposure compensation on the D600 by turning the dial directly. Need to press and hold a button then turn the dial to compensate exposure in the Av/Tv mode.
3) Small spread of AF points. Enough has been said about this.
Other than these few points, I find that the D600 is a great camera. :thumbsup: