I really like that BOB made adapters for all major brands of car seat for this stroller. It allows your infant to use this as a travel system while you have the other seat for your older child. It installs fairly easily and has safety in mind. My son loves the snack tray for his side of the stroller. My only issue is that it seems to tilt the car seat back a bit more than it would be in the car, causing my baby's head to be further back/down than she's used to.