I have to agree with articulate on this one, the Hannibal is awsome! The sides are fantastic if it's a little windy (we also use it as a shower stall). I did add one little feature to it though, the three walls are wonderful, but the truck sits a little high and the wind whips right under. I made a skirt for the truck side out of an old tent which attaches to our slider. The sides can be a little cumbersome to put on, but the awning itself is a snap.
There are two small down sides to the Hannibal; rain tends to collect in a pool and you have to push it up to drain it off (make sure your buddy isn't standing under the corner), and the price is a little steep, but after the number of times we've used it I stopped fussing about the price a long time ago.