I've had the Nex-7 for about a week - and it is quite a power house for two reasons. The jam packed APS-c sensor and it's size. This isn't a review but just a few quick comments about the good and the bad.
The good - Big sensor, similar look and feel of the image compared to my Nikon D3s, Small body, EVF works well and has a lot of contrast and punch, very customizable controls/buttons, manual lenses can easily be used, the panorama function is killer, and the whole thing fits in my work bag.
The Bad - expensive, playback has a bit of hesitation, the shutter has a very long throw - meaning - the shutter seems to take a long time to cycle, video button can be easily and accidentally pressed, and the hot shoe is proprietary.