Bought my first AI in 2009, kept it six years and traded last year for a new one. Both units were Lounge models. The 2009 was on the 22 foot chassis and the new one is on the 3500 EXT chassis which is 24 feet long. I find them very easy to drive and never have a problem parking where ever we go. We prefer traveling in it rather than one of our cars. The lounge model is the most versatile as you have multiple seating areas or a large bed in the back when needed, We, my wife and our golden retriever just traveled to Colorado and back from north Georgia and enjoyed the trip. Try the Airstream Interstate Forum for any questions or research.