The great thing is that they work great for infants too without any special inserts. I froggy legged Cooper until he was old enough to spread his legs. By froggy legging him, it put him high enough up in the carrier that it was comfortable for both of us and his head was always right there for me to kiss it. And you can easily roll it up and throw it in your bag unlike the structured carriers. I used mine with Devin once she was about 6 months old, but with Cooper I used it from day 1 because it was by far my favorite of all of the ones I used with Devin. Also, there are a ton of them out there in all different price ranges. I always got mine on etsy because the more name brand ones were just so expensive. Now Infantimo sells one that actually looks pretty nice.