Very nice concept, but you can say goodbye to using your rear entry ladder/gate for anything I guess.
I don't know, I can walk around my 20 footer and snap the cover on in about 3 minutes I would guess. If you do it the same way every time and put it away with putting it back on in mind, it's really pretty easy.
I snap it across the back, and start up the port side, I then roll it out and snap it as I work my way forward. I end up at the front gate, where I do have 2 feet of space in front of the gate to stand on.