I am pretty interested in a Fiamma or a FoxWing, but I would need to see the FoxWing first.
In the meantime, we use a Kelty Carport Deluxe. It takes maybe 5-10 minutes to set up, but it can either be used down as a side tent or up with the included poles as a massive awning. When it's down, it has side flaps for privacy, so it's like a changing room.
It can also be used on its own as a shelter without the vehicle, set up as a lean-to.
Here's a few pics, one of a FoxWing from their site and then the Kelty on our van.