I have a Fiamma Caravanstore roll out on my camper van, bought last August. I also intended to use it on my caravan, which is why I bought a roll out instead of a fixed awning,(ie, fixed to the side of the van in a box).
However, I've now found that the awning rail on the caravan is too low and the door catches on the awning bag! Just something to watch for.
On the camper, it works very well, but be aware that you may well need to take it down in strong wind.
I'd also recommend that you buy the extra rafter rail.