I had a Bronica S (not an S2) for a number of years, but I finally sold it a few weeks ago. I originally bought it because I couldn't afford a Hasselblad (and still can't, really)
Some nice touches were ...
- Close-focus ability: since the lenses extend into the body they can focus down to much less than 1 meter
- No need to advance the film/cock the shutter to see through the viewfinder
- When putting a back on the body, the darkslide automatically pops-out
- With a back removed, there is no way to accidentally pull out the darkslide and ruin ones film
- Backs for the S and S2 are interchangeable and cheap. I was able to gett them for about $20 a piece
Some things I didn't like ...
- Noise. Similar to, if not louder than, a Pentax 67. Bronicas make a loud
CLANG! whereas Hasselblads make a softer
CLOP. If noise doesn't bother you then this isn't an issue
- The lack of lenses - I couldn't find anything other than the 75/2.8 (without going on to eBay.)
- Weight. The S series are not light-weight cameras
- Reliability ...
It is my understanding that earlier models had brass gears, which didn't hold up so well under heavy professional use. The S2 features steel gears, which are more robust. I've been told that most repair places in Japan will refuse Bronica repairs, since internally they are quite complex. This page (in French, but Google Chrome will translate it nicely) has tons of information on Bronica, including pictures of the internals:
http://www.dirapon.be/bronica.htm - personally I think they are mechanical masterpieces, but I can see why a repair person would recoil in terror.
I had a complete set: An S with case and original box, the prism finder with case and box, the extension tubes with original box, a darkslide with plastic case, and the metal lens shade. Local places said I'd be lucky to get $20 for the whole thing, so a local Bronica-nut bought it all for $150.