I've got one of these now!
I've got a comfy front passenger seat now, as it's lovely and compact in the back (I have a grande Punto).
I also tried a Cybex Sirona, but I'm glad I didn't buy that now, based on what I've since read about impact shields.
As I said, it's compact, but DD still has comfy leg room in the back, just less than the BeSafe Izi Combi that we had before. The swivel base is a bit stiff, and it seems to stick a little bit - that might be because it's new though, and just needs breaking in a bit. It might also be that I'm being too gentle with it. But it works, and is very handy indeed.
I'm also a bit disappointed that, unless I'm doing it wrong, the headrest is at the highest setting, so it might not have the growing room that the BeSafe had. But overall, it's a lovely looking seat, and I get the leg room back in the front seat, so it will do for now 
DD is 3.3, so I wasn't going to keep her RF for much longer anyway. She's dinky though - only 25th and 9th centile for height and weight (can't remember which way round
) - and not heavy enough for a Stage 2 seat. Hopefully by the time we have a second DC, she will be big enough for a Stage 2/3, but not too big for this one else I can see me having to switch back to the BeSafe - which will be a pain because of the not-much-legroom in the front and because the BeSafe doesn't fit FF in my car stupid angled back seat.
FWIW I won this car seat, so I haven't spent money on it, else I would definitely have gone to get it tested in my car first and found out about the size etc beforehand.
Tis lovely though.