"Nope, but never had a 12v DC go bad either"
Bet-cha nickel an Eskimo has never tasted a mango, either.
You are quite fortunate. The vendor I subcontracted to shipped warranty batteries back by the pallet (36 batteries at a whack) Three pallets per load.
Comparing an auto "RV" battery to a good golf car battery is like comparing a "Ginzu" knife to a Buck knife. Some folks do just fine with Ron Popiel's product. But I draw the line when they brag their knife is "Just As Good".
Like anything else, perspective is most accurate when dealing with enough numbers to quantify a realistic sampling. I have to live by these rules just like everyone else.