I've flirted with several medium format film cameras over the past seven years, struggling to find one that feels good to me. I owned the Mamiya 645Pro system the longest, but it was a big and heavy beast. I can see how this camera would be great in the studio or on a wedding shoot, but for an avid hiker like me, it was just too much to lug around. I recently traded it for a Pentax 645n, which is smaller and lighter than the Mamiya.
I did make some pleasing pictures with the camera. Here are some Portra 400 shots taken a few years ago in Freestone, CA.