The C62 has been an excellent combine and, at almost 2,000 seperator hours, I think it's proven itself. Aside from excessive walker loss (which the sunnybrook mods and walker risers seemed to help allieviate),it's been okay. The R62 has been a nightmare from "day 1"! The machine has had engine problems; - intermittent power loss, excessive fuel usage (compared the the C62),plus I've had 2 cab fires and severe electrial problems the entire season. Cummins has looked at the problem, but have come up with no solutions as yet. My local AGCO dealer has been as supportive as possible, but "all the support in the world" from AGCO and "empty promises" from Cummins isn't putting any grain in the bin for me. As far as the rest of the combine is concerned, - no problems!