I only have a 2 1/2 yr old DS. But I am dying for a frontier when he is a little older. I have sat him in the prosport, nautilus, and frontier 85.
The prosport is very narrow for an older kid, and the nautilus strap already seemed to be coming out under his butt/crotch at only 2 when I last set him in one. He is a big boy at the top of the charts.
There are too many complaints when you read reviews on the nautilus about the crotch strap not being set out far enough for older kids. I would never buy one personally.
Proud SAHM to Connor (8-6-10)
and our little