My wife wanted/wants a big trailer with all the home amenities. She is disabled (though don't tell her I said that!), and has a tough time climbing up two or three steps to access the normal trailers. Besides all the reasons mentioned already by others, I just wanted something comfortable, simple and very tow-able. My wife will beed to help with the driving occasionally and she will never tow anything bigger than the TD. OK, she is not excited about this thing at all, but, When I force her to try it once I think she will change her mind about it.
My dream is to take off with my TD and see the western US for a couple months, stopping occasionally in a motel to freshen up. Later, maybe mid-winter, spend another month on the gulf coast. Then trhe next summer go up to New England, Nova Scotia, Newfi, PE Island, etc.