I see some people think that RF is only for little kids and believes that it is not enough room for RF seats past the babystage. That is not true.
Lots of pictures hereforum.nybaktmamma.com/showthread.php?t=524428 are some pictures of kids all the way up till over 6 YRS rear-facing.
Heresikringavbarnibil.blogspot.com/2007/10/biler-med-plass-til-tre-barneseter.html is some pictures of three carseats in normal familiy cars(smallest one is a VW Polo).