Narikin:
I own the camera, the lens, and a Kodak ProBack. (My 350 is also missing its lens hood--and it'd be a miracle ever to locate one.)
It is heavy and cumbersome, but an exceptionally sharp lens. You'll absolutely have to have it on a tripod or monopod. Autofocus is accurate, but as slow as most older medium format systems' autofocus mechanisms are. I have used it, however, to shoot baseball and equestrian events with excellent results. Image quality is stellar.