Sometimes, it seems that all we hear are problems and issues folks have with coaches and since we have just completed an 8,125 mile trip over 6 months since buying our new 2010 Winnebago Tour 42AD coach in April, 2011, we thought it would be interesting to provide an update as to our experiences.
First, we used about 940 gallons of Diesel in our trip from Florida to the upper peninsula of Michigan, to Colorado, then Texas and finally back to Florida. During this trip, we averaged 8.3 mpg while towing a Buick LaCrosse, which I thought was pretty good mileage while running in a wide variety of terrain -- from sea level to over 8,000' high.
This was our first trip in the new coach and we had a few issues, the most critical was a leaking windshield caused by an improper windshield replacement prior to our purchasing the coach (the original was broken during initial delivery to the dealer). Winnebago fixed this, a couple of cracked floor tiles, and a leaking HWH leveler jack during a visit to the factory in Forest City. Other than these relatively minor issues, the coach performed great.
This coach replaced a 2008 Tour 40TD, which we enjoyed for three years, but the new 42AD is wonderful. The extra room, stacked washer/dryer, king bed, and more storage is great. As fulltime RVers, we also liked the enhanced cabinetry and other features -- Winnebago has a real winner in their 42' offerings.
The Freightliner chassis was flawless -- no problems at all!

Great power from the Cummins 400 (this is a pre-urea coach) and perfect shifting from the Allison transmission. We did have some learning to go through with the tag axle and weighing the coach (learned that you need to dump the air and let it re-fill before weighing), but everything worked great. The ride quality and directional stability of the tag axle chassis also seems better than the 40' coach we had before.
We had no electronic or electrical issues, which is kind of amazing given the number of systems on this coach. Further, the 3 roof air conditioners performed fabulously in hot weather -- a real improvement over our 40 coach.
All in all, a great trip and a great coach.