I didn't swap a marathon for a frontier but I have owned two marathons in the past and now own a frontier (among others). I also currently have a roundabout 55 which is supposedly the same size as the marathon.
Both seats are wide. But they wide in different spots. Frontier sits against the seat and is low profile whereas the roundabout sits on a base and up high and out far. I don't find the frontier to be monstrously huge. Marathon may overlap other seats allowing for a good puzzle but I have no experience with this. I do not know how they puzzle though because mine are in captains chairs and my third row bench is large so may not be an issue.
Hi, I'm Brittney
Wife to one amazing man.
Mom to FOUR amazing blessings.
***IDSO Salt Water Sandals- White, Toddler 7***
Last edited by mommabritt; 10-09-2012 at 10:42 AM.