My S2A was a great camera, and so were the Nikkor medium format optics of that era. The attraction and downfall of the early system was the falling mirror design (and split mirror with the EC system), which made it possible for wide lenses to protrude into the mirror box, so they didn't need as much retrofocus correction as lenses for other MF SLRs. The 40mm lens was a real gem, as was the 50/2.8.
Not having a mirror to block out the viewfinder, however, necessitated a system with three shutters--one for the film plane, one for the viewfinder, and one to prevent light from reflecting up from the mirror onto the film during exposure, making the camera louder, heavier, and more complex than it might otherwise be. It was also very easy to adapt large format lenses to the older system, because it could use either screwmount or its own native bayonet mount, so I had some interesting lens adaptations like a 500mm Tele-Xenar, a Heliar of around 210mm as I recall, and various macro options. I also adapted a Kiev TTL Spot finder to it, made a groundglass back, and there was a T-S bellows for macro with full view camera movements on the front standard.
When I got my Linhof 2x3 system, I found myself using the Bronica less often and sold off the system, but I never had any complaints about it, and it was very easy to build an extensive system at low cost.