36MP - 35mm frame - £2500.
Its a Nikon. For me that means it should feel good in the hand, its should be well laid out and it should perform well. Well the D800 does all that. Having spent such a long time using CSC's it did feel very big when I first picked it up. However, it wasn't quite as heavy as I was expecting. I did though spend most of the day using a 50mm f/1.8 on it. AF seems fast and accurate, even with my ancient D lenses. The manual focus confirmation worked very well with my Voigtlander 20mm incidentally. This has not always been the case with Nikons I have used.
The menus are typically Nikon. I've set the camera up how I want it and haven't even unpacked the manual. However if you are not used to the way they do things, that may not be so easy.
One thing that was certainly different was the depth of field at my most commonly used apertures. Its been a while since I used a 35mm sized sensor. Incidentally I must insert here how much I hate the term "full-frame". Its innacurate, meaningless and I have no idea how its become so universally accepted. Full frame indicates that this is the biggest, the largest, the ultimate sized frame. However its obviously not since there are larger sensors available.
So, the thing I noticed most was that I was getting far less DOF than I'm used to. Now this is something I don't get all hot and bothered about, and usually I'm aiming for the opposite. However there is doubt that images like the one below have their charms.
It is going to be followed apparently by a Sony version as well. At this moment in time Nikon have the lead in this and it seems they want it too. They could have easily charged a lot more for this camera, but the price is very competitive. It certainly drew me out of my Mirrorless / E.V.I.L / CSC comfort zone, and I'm certainly looking forward to seeing just exactly what its capable of.