Not that I would recommend -- the Fiamma "room" and the older Thule room look like pains which is what people on this thread are saying.
I do not intend to change my awning (expensive!) - but the Thule "room" is a tent under an awning and uses the structure of the awning to hold it up. The concept works. The details could get complicated. For me, with the Fiamma awning, there appears to be an easy, essentially free way to make the outer attachments work (rope and knots that slide in the awning channel). It is the attachments on the van side that are iffy. Given how my awning is attached to the van, I may be able to bugger in a way to attach a rail with a "slide channel" to substitute for what is built into the Thule cassette, and I think that would work. There is such a rail with channel and it is not hugely expensive. There are also some bendable poles on the Thule -- light, easy, but fit is unknown. I also do not see (even with a Thule awning) any way to prevent bugs from flying under the van, an issue mentioned by others -- but strong magnets and a piece of screen cloth or ripstop ought to be a cure - at least on a Sprinter, strong magnets are golden.
If anyone has any experience trying any of this ........... ? If the dang thing did not cost so much, I'd just buy and try.