Played around it at my camera store (well, not my store) while they had it for the few hours it took to sell it. The OVF/EVF is cool and all that, but not the second coming like many make it out to be. Very nice tactile controls, no question about it. Didn't bother to test the UI further. Solid feel which is erroneously often described as "build quality." I'm sure it's quite a nice camera, but for a very specific niche. Not mine, though, which is MFT.
Hopefully there will be further bold niche cameras coming out in the future from various manufacturers who realize that it's not always best business to build the camera appealing to the lowest common demoninator.