As far as interior comfort, this thing is not cramped at all inside. Of all the trucks I have owned/driven it is the most comfortable to drive & reside in while otr. I've always wanted a classic truckers truck, so this is my chance to have that, but I'm not fooling myself here at all, I know the price I pay (in fuel mileage and turning radius) to have this truck out there working as opposed to an aero truck (which I've already owned).
The interior of my truck has a wider bed, full cabinets all around, a work station, and plenty of room to change clothes/ect. I like the leg room inside and having everything within reach. Also have a fridge, and room for a TV and micro easy. This truck is pretty well designed for driver comfort, not like the older ones esp. since they have the "bat cave". Its in the shop right now getting a go over, I'll take some interior pics when I pick it up and post for you to see what all I'm talking about