Had my unit replaced once right after purchase. (08)
So far so good.
Won't replace with concertone once she dies. Rather be out camping than dealing with warranty issues. Time is one thing I never get back.
I would also not buy a new rig if it had a concertone in it. Way to many issues with the unit for lots of folks. Unless they agreed to pay me for my troubles if it went south.
FR must be getting one sweet deal on these units to keep putting them in and dealing with customer complaints. I like satisfied customers better. They buy more from me. Continuing to use problematic systems just doesn't make sense to me.