I recently purchased a Fujifilm GF670 (medium format "folder") and took it on a walkabout in Washington DC. I also brought my Leica MP along. I took images with both cameras and wrote a blog post about my experiences and the images produced by each. If you've thought about adding the Fuji GF670 to your kit, you might find this an interesting read. You can find it here:
http://wp.me/ph0f6-1KMark