It’s a question of convenience or cost savings. The Doona is a great option for city dwellers, frequent travelers, or caregivers looking for convenience while always on the go with an infant in tow. It is designed to help make the transition from car seat to stoller and back again seamless, and it is the best alternative to the typical stroller plus car seat arrangement. Though convenient and functional, its two-in-one model won’t save you any money. At $550 it’s more expensive than most car seats alone, and ultimately you’ll still have to buy a larger stroller once baby exceeds 35 lbs.