I love my Graco Nautilus! I babysit a little boy who is big for his age. He was 40" and 40# at his 3 yr checkup. I got him a Nautilus for my van when he was 2 1/2. Even though he was within the weight limit for the convertible seat I had before, his shoulders were above the harness, so it time for something new. I definitely couldn't justify the price of a Britax when I only watch him 2 days a week, so I was thrilled to find the Nautilus! He still has plenty of growing room in it. When I bought it, I figured I'd pass it on to my niece after she outgrows her safeseat at 30#, but I think I'm going to have to buy her her own because I like this one so much I plan to keep the little guy in it til he goes off to K and I don't have to watch him anymore.