Has anyone used one of these? How old was your child and you find it useful or just another thing your child kicked out of their way because they were upset they were tied down in a carseat on a long drive?

http://smile.amazon.com/Star-Kids-Snack-Play-Travel/dp/B000KJBFC8/ref=sr_1_1?ie=UTF8&qid=1404129231&sr=8-1&keywords=car+seat+table