So my kid is a giant, and almost already too big for her first car seat. At 5 months she will probably need a new one. These things are 300 bucks a pop for the first one, and they expire. I feel they got you where they want you. You definitely are almost forced into having multiple kids to make it worth the money you spend on the car seats. They play on your heart strings that you are a bad parent if you don't get the good ones. Seems a little scammy to me.