First impressions are very favourable indeed. It's a solid and beautifully finished housing. The castings are substantial and inspire confidence.
The housing is noticably smaller than the DX-D70 and has no seperate tray - the handles fix to the side of the housing itself. The result is a much more compact package which will be easier to travel with.
It has a leak sensor, unlike the DX-D70, and very solid and smooth feeling buttons.
I shall get it wet over the next few days (once this ear infection clears up - grrrrrr!) and post a fuller report - I'm going to do a full review in the new underwater photography forum on photo.net and on my own website once I've returned from the Red Sea in early June.