I would suggest that great majority of posters have been MFD owners.
For my part, I did som market research but ordered my MFD stuff without seeing any MFD camera in real world.
Used it in the field for 33 months, after which I decided a Sony A7RII was a better match for my needs. So the Hasselblad 555/ELD P45+ combo goes into well deserved retirement.
I think that both positive and negative experiences need to be communicated.
At this stage I feel that high MP 24x36 offers better image quality than the admittedly aged MFD equipment I have. It also does it with more flexibility and at a lower cost.
Added 2016-03-31: I have (or had) the following lenses:
- Distagons: 40/4 FLE, 50/4 FLE, 60/3.5
- Planars: 80/2.8CFE, 100/3.5CF , 120/4CF, 120/4 CFi
- Sonnars: 150/4 CT*, 150/4CF, 180/4 CFi
The lenses I would call great are: all Sonnars and the Planar 100/3.5.