I don't have one, but I did buy the NEX6 a couple of weeks ago and thus far I think it's a great camera. The in built applications are a bit clunky (and it's a pain to have to set up an account to buy them).
I've come from Canons (I still have a 5DII) and Micro 4/3 (which I'm getting rid of). The Sony screen/menus are a bit annoying but the camera body is really decent and the results are much better than my old Micro 4/3.
Apparently the old kit lens on the 5r isn't fantastic and is quite large. A Sony rep (in PC world of all places) was telling me that Jessops are exclusively selling a 5r kit with the new compact 16-50PZ lens (which usually just comes with the 6). I'd recommend this if you end up with the 5r.
I had one, but i didnt get on with it, think the nex 6 and 7 are much better. I sold it and got a fuji 1ex, which is amazing, see the main shot on my port for an example of what a csc can do! It is more expensive, 900 quid for body and lens, but worth looking at. also check out www.camerajungle.co.uk , they have a csc cameras used, often very cheap good luck!