Our Damon Daybreak is 28’ 11” It is a class A by style. It is perfect for us but “To each his own” We find the size is quite maneuverable. Some of the state and national parks have a 30’ limit. As far as mileage, I don’t think it makes a lot of difference. We travel in about 6 week stints, and we are quite comfortable for that time frame. After that we miss the grandkids, get our fix and head out again.