UPDATE: See post #7.
I seem to remember seeing posts that the Frontier is more difficult to install than other Britax seats. If my memory is correct, and that is the case, what exactly makes it so difficult? We have a Toyota Highlander, and we are considering replacing DD's Marathon with a Frontier when we get the insurance money. She is 3 1/2, about 39" tall, about 31 lbs. She would be harnessed until at least 40 lbs, probably longer with this seat. We had to move DS to a booster at not quite 40 lbs because he is long and skinny. I'm hoping the Frontier will get us more harnessed time for DD.
DH is against the Frontier; he thinks it looks big and bulky. He noticed that it doesn't have the side bars like the Marthon (for the LATCH belts), and he's worried it would be difficult to install. I'm trying to convince him we should get it instead of another MA.
Thanks!