Hi Peer,

I use a Wacom Cintiq flawlessly with MoI, I use it everyday with no problems.
I also teach MoI to students at a local school and encourage that the mouse is not used but a small Wacom A5 tablet is used instead.
I encourage all to use a tablet only and no mouse to get the best experience from MoI, as far as I am concerned.
The little part greyed out widgets at the bottom of the viewer window work excellently at moving around the model, I find that using the mouse middle wheel simply confuses students and employees alike!

I hope that this viewpoint is helpful to you.