I have a 2002 Focus and its not too bad. I have a Britax Marathon and it fits ok. It is a little hard to see out the back right now, since it is RF, but it is doable. I don't know if they've changed the dimensions since 02. I did see a woman at the park driving a newer Focus with 3 carseats in the back, I wouldn't go that far, but one fits fine.
My BFF had a hatchback and now has a new sedan, and my mom had an 01. I think that you could get any carseat in there. They have a really big blind spot, though. ON more than one occasion we almost changed lanes when someone else was in them.
i drive a 2009. back seat is small, but my triumph fits behind my seat (i'm 5'6ish). my mom drives a 2005 hatchback and i was able to fit the scenera in her back seat. we both love our cars...well, i love everything except how small it is. with another one on the way, we won't be able to fit anything in the backseat besides the 2 carseats...
Re: Anyone drive a Focus?