Thanks to Rich, Naturephoto1 and Luis, Muihlinn, I am carting mine around China in the Shenzhen area as we type. I have shot 30 rolls through it so far and have to say, it carries like a dream.
I shot Pentax 67 for a long time and while I like the depth of field preview, it's nice to not need a mirror lockup to avoid a sprained neck from the mirror recoil.
I liked the lenses on both, but the Mamiya shoots a contrastier image.
I am heading over to Hong Kong tomorrow. I may pick up a lens for it over there.
Next time I come, however, I will probably bring the 8x10.
Best of luck,