As we have had ours only since the end of June and only have put 1,500 miles on it, I can give you a short timer results.
As with every RV bought new, there will be something's needing attention and ours was no exception. We had a few of issues requiring fixing before we would even do the walkthrough. These included a bent body trim piece, rear window handle replacement, engine hood replacement, TV alignment, screen door adjustment, wheel liner replacement, numerous decal replacements and minor scratches on cabinets. Our dealer did attempt to address each one but needed to order parts which would take about a month to come in. Well, they all did come in and have all been fixed as promised with the exception of the engine hood.
So far, we have run all systems, including the heat, and can attest that all are working as they should. So therefore, I say Jayco has done us right and we are happy with our purchase. I'm a believer that the dealer makes the purchase experience good or bad.