My Mom and Dad had one that they bought new in 1972 when my Dad took early retirement. Towed a VW bug behind it all over the country. I was still in college and got post cards and letters from time to time. I think I inherited the "illness" from them.
They must be a good unit to be around for 40+ years. I know my folks never had a problem with theirs.
Retired and visiting as much of this beautiful country as I can.