I have had it for a couple of days. The ergonomics are not that great, at least in my opinion. I find it uncomfortable to hold after a period of time. When taking a lot of pics it seems to get a little warm too. I too find the display after shooting to be slow, it is slow writing to the cards, I expected that, but I am spoiled with my other cameras. Mine seems to expose a little on the hot side, but I am still getting used to it. As to be expected it hard to see the lcd in bright sunlight, hard to manual focus, at least for me as I wear glasses. I see some strange softness on parts of the image, not sure if the lens element on mine is off slightly, need to shoot some test shots to test it. Focusing is reasonably flash and there is some shutter delay. Also until it is done completely with the writing of the data it does not respond to changes to controls, like the dials for setting aperture, etc. Seem to be a bit of lag from the time the writing stops to the time it will respond again. The limited number of focus points is problem, compared to what I am used to using.
I did not use any of the previous dp merrills but did read about them. Was intrigued to try this because of all the resolution. Still having a good time with it and will until I have to send it back.
Alan