We've owned our rig for about four years. My son and I used it a lot for pulling a race car trailer, spending nights at the track. The M2 chassis has been good, the engine is superb and most things are all right. In Great Plains country, we make about 12mpg if I keep the revs at about 1800. The trailer didn't change that much. Hills and mountains are another story!
The ride over the road is good if you've got some weight on the trailer hitch. If no trailer is on, it's choppy. The missus has worked hard to refine the travel packing of rattly stuff!
Until this spring. The automatic power transfer switch burned up and took a lot of stuff out on the way. We lost the power inverter, the microwave, the satellite TV box, the awning and approximately one-third of the circuit breaker panel power strips. Things are back to normal soon.
We love the motorhome. My wife is now retired, too, and we travel some, spending this summer in Colorado.
Good choice for us!