How much would you pay for your child's safety? Priceless is my opinion, so three hundred dollars over a four year span is surely worth it. That's less than fifty cent a day! You pay more than that for your coffee each week or one trip through the drive up window. A booster chair then, that will last until the child is just inches under five feet tall or roughly eight years old is surely a wise investment. One word of advice, make sure your child likes it and if possible, get a return policy in case he/she does not.