We have a 2012 Roadtrek RS... nice rig.. fuel economy on the road is 19 to 20 depending on your speed...18 MPG cruising at 70... speed does affect the MPG...
On storage.. yes, it's limited..take only what you need... most people who purchase a Class B.. know this going in.
The flexibility, ease of driving, and nimble handling of these smaller rigs is definitely their strengths...
It's a very smooth ride, and fairly quiet.. plenty of power... remember, it's 190 HP, and only 23 feet... consider this, those large 40 foot Class As have between 350 and 400 horsepower.. they are more than twice the weight of a Class B....
Driving a Class A and towing a car is a real commitment..and you have to practically radio the "air traffic controller" ...LOL .. just to figure out your next stop...no thanks..
We got ours for traveling, some camping and fun.. we don't live in the rig...I can only understand people driving Class As who intend to make it their permanent home and travel a few places ... snowbirds...etc.
Only thing we found is that the heater is a little noisy, so is the generator and air conditioning... Plus, when it's cold the heater cycles on all night long (especially at 32-38 degrees)...it can dry out your sinuses quickly.....
I imagine that the radiant heat would have been nice.. but, we don't have that...
Enjoy your Roadtrek... they are very well built as many other Class B's..
Most of the really cheap interiors I've seen are on the inexpensive Class C rigs.