http://www.rooftent.co.uk/webpages/maggiolina.html
Hmmm, is the roof really designed to hold two people?
To be honest, I find it much easier to have an empty car most of the time then simply chuck in a bit of camping gear as and when needed.
I have the 2 man easy up tent - instant up as well as a 3m x 6m pop-up gazebo to provide the extra shelter at night (for tent and car!) - this has drop down sides to give additional privacy.
I have a couple of really sturdy picnic tables, each made from a sheet of exterior ply, that can be assembled in seconds - one to cook on, the other to eat & prep.
Fitting the dobbin out like they have done adds a heck of a lot of weight and unless it is easy to remove, it adds a lot of extra weight.
It's a nice idea but not for me, my camping gear is a couple of plastic boxes with rollers plus a couple of bundles, everything in or out in a couple of minutes & camp is set up in another few minutes.