We are flying in a couple of weeks and have always used our uptowns as they are our lightest car-seats. However my kids at almost 4 look so squished in them even though they are below all the limits. I'm considering taking the true-fits -also because they are so much cooler but I'm worried that they won't be as easy to maneuver and fit on the plane. I have twins so we will be hauling two seats around.