I sold my RB67 Pro SD along with 35mm kit after moving to digital some years ago. Last year I returned to shooting 35mm film. Seeing the RB67 on Ebay in the last few days at very low prices I am finding the urge to buy it again difficult to resist. I always found it more rewarding than 35mm and a TLR.
The RB67 is probably one of the best values out there right now in used gear. High quality kit at fairly low prices. The only real drawback to the system is its size, which does make it kind of a pain for just walking around with. On the other hand, it fits nicely into the trunk bag of my bike.