My new MB-D100 was waiting for me when I got home. When attached to the D100, the combination makes it better than a half inch taller than my F5. The base is broader than the F5 too. The combination makes the camera taller than it is wide.
Nikon does a nice job of providing storage for the D100 battery door and the rubber connector cover that have to be removed to attach the MB-D100. I found the vertical controls easy to access and I have about average to small size hands for a man.
The MB-D100 doesn't connect to the D100 as tightly as I would like. You can feel a definite movement between the MB-D100 and D100, so it may have to be removed when mounting the D100 on a tripod with my lenses that do not have a collar. I didn't play with the voice recorder, as I really don't see a use for it.
Overall I am a little disappointed with the MB-D100. The size of the combination and stability of the connection puts me off. I am going to keep it, because the vertical controls will be handy when I am shooting off tripod, but the MB-D100 will probably be off the camera more than on.