As others have said, rear leg room with the seats fully back is no problem at all, and puts most mid-sized cars to shame.
I'm 6 foot, but quite long legged, so legroom is sometimes an issue. I find two Jazzes we have fine to drive, the mark 1 marginally more comfortable for driver legroom, but the mark 2 seats are better.
Don't have a mark 3, but I understand they are similar to the mark 2, legroom-wise.