I own the Britax Marathon 70 Convertible Carseat, and I LOVE it. It is huge, I won't lie. We own a 2009 Toyota Yaris Sedan and it fits in middle of the backseat, but just barely. My daughter loves the seat though, and the padding and fabric is very comfortable (we have the Allison Print). This seat is great for Extended Rear Facing and Forward Facing.