Also, Britax is in the process of redesigning the majority of their infant car seat adapters for the B-Agile including Chicco, Peg Perego, and Graco brand seats. They have indicated a launch date for these adapters for some time in 2018. As a result, the B-Agile is only compatible with the Britax, Cybex, Nuna, and Maxi-Cosi brands and given the lack of a specific release date, we do not recommend that parents purchase the B-Agile with the intent of using it as a travel system with any other brand.
You may find that your existing car seat is perfect for travel – it’s easy to install, relatively lightweight and is approved for use on airplanes. However, you may find that it is easier for you to travel with a car seat that you have bought specifically for the job – one that is as easy as possible to navigate around airports and hotels and to install.
A one-handed fold design and lightweight aluminum frame make the stroller fairly easy to carry. First time parents appreciated the level indicators on the seat base so they could easily tell if the angle was good during installation. The seat clicks easily onto the stroller as well. The canopy offers good SPF 50+ sun protection, and there’s a mesh peek-a-boo window to keep an eye on baby.
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Parents were also unhappy that the stroller isn’t compatible with more brands such as Chicco and Britax. Some parents noted that the seats didn’t have enough recline when sitting fully upright, and that their children tended to slide down. There also seems to be a tendency for tipping over if a child stands or climbs into the seat with their knees.
The braking system felt a little awkward to some parents, especially when wearing sandals. You press it down with your foot to engage, but have to lift it up to disengage. One parent felt the wheels were a bit too small for uneven terrain. The carrier fabric lacks some breathability, so your baby could get sweaty in hot weather. Chubby babies or those who are on the high side of the growth chart may feel too cramped in this seat.
This product is heavier and larger when folded than some of the other full-size competitors, like the Britax B-Agile 3, because of its jogger design. However, the Flex offers more features for your baby's comfort as a result of the design geared toward running and trail use. The Flex will work with a variety of infant car seats when you use an adapter (sold separately), but we aren't big fans of the two-step attachment process that includes straps we fear parents will choose not to use.

What do we love about this product? For starters, it comes with a one-second, one-hand fold so you can fold and store the stroller (despite dealing with all the weight) with just a single hand. You can freely hold your child with your other hand if that is something you have to do. The stroller also locks in place automatically when folded and can stand on its own, making it very easy to transport and store.

If we had to pick one strolling product we'd recommend to a friend interested in quality, it is the UPPAbaby Cruz. It's lightweight, easy to use, and made of high-quality materials that feel like they will last for years. Plus, the Cruz works well with an infant car seat including a few of our favorites, like the award-winning UPPAbaby Mesa and Chicco KeyFit 30. The Cruz earned our Editors' Choice award in both our shoot-out of full-size options, as well as another Editors' Choice award in our Stroller and Car Seat Combo Review.
I’ve seen parents do just about everything to get a car seat through the airport. If you travel frequently, a purposely built travel car seat like the GoGo Kidz Travelmate or Britax Car Seat Travel Cart converts your car seat into a stroller for the ride through the airport. Other ideas are to balance it in your stroller, strap it to a suitcase, or lengthen the straps so you can wear it over your shoulder like a backpack. When it comes time to board, consider having one parent board first to install the car seat, allowing the other parent and children to board just before the doors close.