Has anyone every used one of these things? I am taking my 13 month old to Chicago for the weekend for a family wedding and we will only be in the car for the ride to and from the airport. I was hoping to find something so I wouldn't have to shlep the big carseat around with me. I have found a few onlilne, but I don't know how well they would work in the car. They seem to be made for airplane use. I figured if the vest could attach to the seat belts on the plane wouldn't it be the same for the seat belt in the car?

Am I making any sense here?????