This is our second Rialta, sold the 2001 and bought a 2002 with the full size bed in the rear, and lower miles on the engine. I had the door windows and the windshield lightly tinted but with film that keeps out the heat and it keeps us and the dash cover cool, even while driving into the sunlight. I replaced the mattress with a piece of foam and two inches of memory foam on the top. Yes, I had to replace the cab A/C in both the units while traveling.