I've owned two, one I've shot with. My experience with them was not too good. It produced somewhat hazy images even with modern lenses and I am not sure why. It may be that it had a small light leak, but I never got it checked out by a tech so I am not sure, I just sold it. The other problem might have been a non-standard flange to film distance -- a tech can check and sometimes set this too though.
They are hard to find with good curtains.
I think they are cetainly work pursuing though if you can find a nice one. The bodies are pretty well built like most Japanese RF's of that era, and they are pretty!
The swing open back for film loading is a real blessing as well. I may try another one.