One surprise on mine were some diagonal braces that I didn't notice in the pictures. These braces reduces the height by about 10" at the eaves and if you are planning on all the height available (all thee way to the wall) it could be a problem. In my case I just have to be a little careful backing in if I crowd the side, the trailer is the distance from the wall that I want I just have to be careful not to hit one of the diagonals if I don't go in straight.
I have 3 sides enclosed and the front open, where I have mine installed there is heavy woods on two sides so I had steel installed on those sides, the side towards the house I put siding that matches the house.