We've put our Dandy awning up just the once, it was really easy to do, we were really impressed with it. The roof is separate to the sides, whether this made it easier I'm not sure. I would even say it was easier than any of our campervan awning we've tried over the years.
The biggest down side was the weight, but at least it didn't flap in the wind, also it had the advantage of not having to the dry it out at home. Our big campervan awning can be a pain to dry, but at least out little toilet tent and be hung up the stairs.