Some people prefer TLRs like Yasicha, Rolleiflex or Rolleicord. I don't mind the weight of the Mamiya most of the time, but there is little doubt that a Rolleicord/Rolleiflex is lighter, less bulky and niftier to use. I still love my C330, though, because of the interchangable lenses and the various viewfinders and other accessories. The large focus throw and close focus capability that the bellows focusing allows for, is great. I have since added a 65mm and an 80mm "blue dot" lens.
The 65mm is a very versatile lens and the 80mm is quite fast and very sharp.
65mm F3.5:
80mm F2.8 "Blue dot":