I love our Marathons.  I bought them when our son was outgrowing his infant seat.  When our daughter was born three years later she was immediately placed in a Marathon with a Snuzzler.  I hate baby buckets.

I like the nontwisting straps, my son can fasten himself.  I love the covers that are available seperatley in case of spills.  Installing them and uninstalling them is a breeze.

The only negative is that these are wide seats.