Happy to see M-Ds in action! I've been back from Cuba for a couple of weeks now, all photos there shot with my M-D and 28 Summicron. Aiming to pack for absolutely minimal value and quantity of stuff, I'd earlier figured on taking the Pentax K-3 and a 20-40mm zoom. After the M-D arrived I changed my mind, taking it along with the 50mm and 28mm Summicrons. In retrospect, a good choice. Did not use the 50.
I don't recall ever looking at the (missing) screen; per custom, it just doesn't occur to me. I do like to see the ISO dial on the back, an immediate visual reminder or opportunity to change, like shutter and aperture. With it so easy to change, I don't miss Auto ISO. So this camera is a fine choice for me, very comfortable to use.
I made about 800 exposures on one 32Gb card with lots of room to spare. Plenty of opportunity every day to charge the battery... on 220v mains! I took a voltage converter with plug adapter, good thing as the one hotel supplied a non-working converter and the other hotel none at all. Never needed the second battery, as I commonly turn off the main switch when not actively shooting. Seeing an opportunity, I turn on the switch and by the time the camera is at my eye it's ready to go.
One question I had about file numbering got answered: When formatting a card I set the file count back to zero in another M, not being able to do that in the M-D, that file count info stays with the other camera, not the card. The M-D will name files with numbers in sequence forever! So, no point in setting it back for this camera, just use a different sequence of actions in DNG Rename later.
I did not take a laptop so all pics stayed on the card in the camera, no chance of misplacing it. I will be working on processing in a few weeks.
Oh, and as to the time for Leica to service my cameras, the M240 arrived back in January... June 20 to Jan 20... 7 months. The two M8 bodies arrived today with no notation as to what was done, nor what parts they had been waiting for while in Germany... 9 months. They both had what looked like column faults, so perhaps it was more serious and they got new sensors.