We just got and installed our marathon, and I have a couple concerns:
1. I can't get the straps tight enough.
2. It seems like within a week or 2 J is going to figure out how to unlatch the crotch buckle. Yikes!
Did anyone have either of these problems? I'm thinking about returning it - who cares about the safety rating if I can't get him properly strapped in.
Re: need advice from britax users, esp marathon
Are you using the latch system to install it? I always put my knee in the seat and put all my weight in it and pull the latch straps tight. Otherwise it may not be installed properly and you should go get help with installing it.
Cruz is 3 and still can't get that crotch button undone, he gets into LOTS of things(including those childproof doorknobs) and that one he can't do.
Sorry, I meant the harness straps.
Hmm are they right at his shoulders? I've never had that problem with mine.