Pros/cons of the Fiamma other than the mounting issues:
>>>Quick and easy to deploy.
>>>Provides shade if positioned correctly.
>>>If staked out well, they can withstand reasonable wind.
>>>Adding nylon sides makes for a nice room if you have a propane fire during mildly cold weather.
>>>Easy to retract when on the move.
>>>Helps in rain no doubt.
<<<Can become a sail in high winds which can do body damage to your vehicle.
<<<On a Econoline van (depending on the vans lift and terrain) the barn doors can hit the awning if not fully raised.
<<<To the above, water can pool if no slant can be applied.
<<<Its not something that can be put up in camp as standalone shelter and must be retracted each time the vehicle moves. It is kinda nice to come back to camp and not have to set something up.
<<<Trees/limbs are a minor/major issue depending on the terrain while on the trail.
<<<During fall, leaves can make a mess if awning collects water...the leaves are kinda hard to clean off.
I'm sure others have pros and cons and I might have misse a few myself