I suspect the loose spooling issue is fairly common among rollfilm cameras. Actually I have two Fujis... The GS645S (60mm f/4) was my first medium format RF, though I had a 6x7 Pentax for many years. This GS is a cute little all-manual rig that is very easy to carry, but needs to be kept from banging into things. :-(
Then I got the second Fuji later, after the Bronica. This is a GA645Wi with fixed 45mm f/4 wide angle lens. The zoom model Zi was offered later but mine has all the same auto/motor stuff.
This Fuji's features make it easier to just blast away without even looking in the viewfinder... it focuses itself! The slower response to the shutter button has been frustrating at times. And the auto-focus just picks whatever's in the center to focus on, not always what I want. So it has its own mix of "hey neato" and "doggone" attributes.
All three of these cameras can produce great images, and I find myself more and more reluctant to take out a camera with that puny 35mm film! Since at this point I haven't been making large enlargements, what I'm noticing most is a better tonal richness in the shadows.
I think the Bronica of the three has the greatest versatility, what with the interchangeable lenses. I like its user interface best as well. This is a wonderful camera, and if I had to pare down to one 645 rangefinder, this is the keeper. If it came to a battle between keeping the Bronica or my big Pentaxes, well, I don't want to face that one! They really have different uses, and I've been in a wide-angle RF mode for a while.
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