I received my NEX-7 grip today and promptly put it on the camera. The fit is good but the best part is the 'in the hand' experience with the grip. It just makes the whole camera feel much more substantial with the right thumb in a much better position to toggle the MF Assist. I also really appreciate that I can now put my Benro mounting plate on the bottom of the grip without worrying about interference with the attached lens or adapter.
Again, the best part of this grip in my quick 10 minutes with it is how the whole camera feels in the hand.
Here's one more with the NEX-7 and grip mounted on my Benro ballhead and tripod. For me, this is reason alone to get this grip. It provides some clearance between the tripod mount plate and the lens/adapter. Shown here with the Zeiss 100mm makro-planar and Conurus Smart Adapter.