Thanks Andie. Nobody I know has ever mentioned the problem with no room once the car seat is in. Nor has anyone ever mentioned anything about an extension strap. we are a little annoyed actually! Maybe it is the particular type of seat? It's a Hipod Milan from Target, but then again why has nobody ever said to me "Cos you have a hatchback you might wanna get a seat that is a bit more compact" or something along those lines.

I just need to know if extension straps are universal. Can't seem to find a straight answer on google!