Tom, the 80 is a very good lens, like every lens in the lineup. I have, or have had, the 35, 55, 80, 130, 140, 210, and 350. All are excellent; the 35, 55, 120, 140, and 350 are stellar.
The camera itself has about the best handheld ergonomics of any MF camera I've used. It's ideal for handheld shooting. Metering accuracy is exemplary; controls are well laid out; camera is built like a tank.
Only reason I'm considering selling my system is because I've become spoiled by the huge 6x7 negatives
from the Mamiya 7 and RZ67. I haven't yet done it out of a sense that I'll regret parting with such a superb instrument.