Hi everyone, I just wanted to mention that I returned my marathon and got the Fisher Price Safe Voyage Deluxe Convertible Car Seat instead. I love this seat. I feel that it is easier to get my 2 year old in and out of (those Velcro things on the marathon to hold the straps was too high anyway), I also like how well they covered the harness lever on the Fisher Price. On the Marathon I was really worried about my daughter leaning forward and pulling on it and loosening her harness. Anyway, so far so good. It is in my Dodge Durango and it is a perfect fit. I am happy with my install thanks to this website I have learned tons. So thank you You may not feel like you make a big difference, butcha do.