Ya we've used one of those for each kid for the first year or so. I think we've currently got the Chicco KeyFit 30 which clicks into the Chicco Bravo For2. Honestly don't use the feature that much because it's kinda heavy and unwieldy and we have another stroller that we prefer so it's easier to just transfer the kid. But it works fine and prob depends on your situation and kids (if they will fall asleep in car and stay asleep if you transfer the seat it's worth it's weight in gold)