Once I saw a video on youtube where they were showing its interface and operations, it seemed like a no-nonsense camera that should be very pleasant to work with.
There's a review in a recent issue of Nihon Camera magazine. It doesn't do that much better than a D3x in the published images.
I have a Phase and a D3x, and that is exactly the problem: The back can do better, but in real life mostly it won't.
Digilloyd has a careful review of the S2 where he has the same type of conclusions.
The difference of the Pentax of course is that it is cheap; so it does offer the "look" at a decent price.
Edmund