You'll grow to like it more and more... Great people rig with the vertical format and fast focusing. If you can find the flash for it, you may enjoy it, too. It's small and perfect for automated fill in harsh light and can cover for light duties as a primary flash (I don't use it that way, though). I normally do everything manually with most of my equipment but there's something about the RF645 system that gives me just what I'm expecting in exposure and especially with the fill flash in program mode for fill.
Treat the winder gently as I've heard of issues with the ham-fisted among us but I've had no issues with mine after many years and many rolls. I just had to have a Mamiya 7 a few years back and while it's a fine and capable camera, the Bronica gets used at least 5 times more. I'd put the optics in the same category/league with each other with the larger-format Mamiya starting to show its format advantage at about 11X14.