Thanks, we're thinking of trying AirTran for the first time. With 2 kids and some of the stories I've read, I think we should spring for the assigned seats. But, I'm also kind of hoping rates might go down before we'd travel, so it would be nice to apply any savings toward seat and/or baggage fees later on.
With kids, I would absolutely spring for the $6 seats ahead of time. I think the $18 - $24 total each way for peace of mind is very worth it! As you said, if the fare goes down it can always be used toward the baggage fees. I would recommend them. I actually preferred them over SW. Have a great trip!