We have traveled the country for 4 1/2 years in this wonderful 2007 Allegro Bus 40QSP. No DEF required for the Cummins 400Hp engine with 60,789 miles on the odometer and 953 hours on the Onan 7500 watt generator. It has been so fun in our rolling apartment. There is a king size Sleep Number bed, a Fisher & Paykel dishwasher and Whirlpool washer/dryer. And like any home we have made upgrades and maintained her with all of our records to prove it. Some of the improvements are as follows: 2017 Valances recovered with neutral beige fabric, 2019 Installed LED headlights, tail-lights, and indoor lights, 2019 New Concerto walk-away flush toilet, 2019 Four new house batteries, 2020 Residential Whirlpool refrigerator installed with ice-maker on door, 2020 Replaced old pleated shades for pull down day/night shades, 2021 Replaced carpeted areas with neutral color carpet, 2021 Added induction cook-top and removed old gas cook-top, 2021 Replaced front two tires - Yokohama (Rear tires 2015). Oh, and there's plenty of storage with tons of cabinets made with real wood in a Cherry Bark color and I lined them all with Reflectix to protect from the outside heat/cold. Underneath the coach, two pull out trays provide plenty of easy to reach storage plus other compartments to store miscellaneous items. Private seller with owner's manual, files filled with maintenance records and even the electrical diagrams from Tiffin. Mr. Bob Tiffin, founder of Tiffin Motorhomes, signed one of the cabinet doors. Love all of the personal touches in this beautiful coach. A few items could be addressed later but they don't effect the performance of this coach in any way: Fogged window on one half of the small window in the driver side slide-out, Hydraulic fluid leak (minor drip) under front passenger side, Propane tank was removed and the bay is empty without a floor. Easy to add box compartment for additional storage. Powered electric reel works but stutters at times. This has been a terrific coach for our great adventures. Hopefully, someone will take her on many more adventures. Email eubanksallegrobus@gmail.com for more information