We have a 2017 Jayco Class C that we purchased in early 2018. So far, it has had recall work performed on the emission control system and the brake sensors but no mechanical issues other than that.
I would have to comment on the amount of discussion regarding the engine. What you didn't hear was about how the vehicle drives. We've have taken ours on long road trips that have ranged from desert and high plains trips, and across the mountains with 12,000 mountain passes. The turbo diesel kicks in and you will not be wanting for a larger engine. The cab is spacious and quiet with no "dog house" to climb over and you can hold a conversation at highway speeds. We cruise at 62 - 65 mph and get 13.5 mpg. Our vehicle has the over-cab storage area that likely reduces the aerodynamics but you can't beat the storage space.
The Sprinter sized RV are the closest you can get to a pickup truck. We can weave through city streets and pull into parking lots without having to fight for space. Width of a truck with a longer length.
We towed a 14 ft double axle utility trailer across country and it was as if it wasn't behind us. Have another trip this spring to pick up our daughter's household good for a move.
Maintenance has been oil changes and we just completed the fuel filter change. Oil changes are a snap if you ignore the price of oil. Fuel filter is easy and just something you need to research first and then just jump in. We have 39,000 miles and have taken short trips recently since we are building a house next door for our kids so time has been limited but we hope to get to Maine after this summer, once the tourist leave and kids are back in school.
I wouldn't shy away from the MB Sprinter.