So since I've gotten the Apex65, I've hated it. ALWAYS. Its big, its bulky, and it just plain sucks. It works for my daughter right now, b/c she is almost 5 and 35lbs. She fits fine in it, still has a set of straps above her. I noticed today (while putting the Nautilus my 3yr old rides in back together) how flimsy and cheap the Apex is!!! The Nautilus has so much more room in it that the Apex. I don't know what it is, but geez, it makes me wish I had $150 to spend on another Nautilus!!! On a side note, that Nautilus is pretty hard to get the cover on/off for cleaning purposes, wow!