At 6'4" I have plenty of headroom in my 2016 Itasca Navion 24G, built on the Mercedes Sprinter 3500 chassis. The main selling point though was the driver's seat room and comfort. I can actually put the seat back too far, something that was impossible in any of the Ford or Chevy based Class Cs. I can also easily move from the driver's seat to the living space without contortions, again something I could not do in the other ones with the big doghouse protruding from the firewall. The rear bed is a little short but it's a "walk around" and I can comfortably hang my feet off the end like I've been doing on most beds since I was 16 or so.