S.M.
I use the Graco Safeseat and boy, am I glad I got that! My baby is a large baby and very long and since the seat can accommodate up to 30 lbs, it's been a great investment. I am looking for a convertible seat now but I have a cushion of time while my other mommy friends are scrambling to switch over because most infant seats go only up to about 22 lbs.