A side-by-side stroller is a good choice when you have twins or children fairly close in size, although many reviewers say they use side-by-sides for babies and toddlers with good results. The advantages of side-by-sides are that kids can sit next to each other and nap in the stroller, since both seats usually recline. The main drawback is that side-by-sides are wide-bodied. Manufacturers are designing them to better fit through doorways and tight spaces, but they'll still take up a lot of room on sidewalks and in store aisles. The best ones are compactly designed and easy to steer.
The Britax B-Agile Double (*Est. $333) has no problem fitting through most doorways and is super-easy to maneuver. Some parents say they are able to steer it with one hand, thanks to the adjustable handle that's uniquely designed with a cutout around the center bar, so you can put your hands in the middle. The front wheel suspension system provides a smooth ride, and large wheels power over everyday terrain like uneven sidewalks and playground mulch. Seats accept 50 pounds each, recline nearly flat to accommodate newborns and have five-point, no-rethread harnesses that adjust easily as children grow. One big disadvantage of the Britax B-Agile is that it only takes one Britax car seat (adapters included), so it isn't a good choice if you need your double stroller to be a complete travel system for twins.
The Baby Jogger City Mini Double (*Est. $450) is very similar to the Britax B-Agile, but with a higher price tag. Many reviewers feel it is harder to maneuver and squeeze through narrower doorways and halls. The handle is on the high side and not adjustable, making it less versatile for short or very tall parents, and its storage basket is skimpy and hard to access. Some reviewers say the Baby Jogger City Mini has better headroom for taller children.
The least expensive of all the side-by-side strollers we assessed, the Combi Twin Sport (*Est. $240), is a moderately priced, lightweight double stroller that is easy to steer and fold. Reviewers praise its maneuverability and handling but think the sun canopies and storage basket are too small. It gets so-so safety ratings from one independent testing organization, and the car seat may be hard to attach.
Unlike the other side-by-sides, the Peg Perego Aria Twin 60-40 (*Est. $350) is specifically designed for children of different ages or sizes. One seat holds up to 60 pounds; the other accommodates up to 40 pounds. It's lightweight and folds up compactly to fit in most car trunks, but parents have difficulties steering it over uneven surfaces, and many complain about the wheels squeaking. There are some safety concerns too: Many who purchase the stroller say the five-point harnesses aren't well secured to the seatback, which can allow children to lean too far forward.