A few weeks back, we officially retired the Chicco Key Fit Infant Carrier. While Abs is still within the weight limits, she's long and it doesn't look very comfortable. Although she still wasn't/isn't 20lbs, we had switched the Britax Marathon in Matt's car forward facing during our May trip from Tampa back to Atlanta. Once the infant carrier was retired, it didn't take long for us to realize how much we missed having two carseats. Our second Marathon arrived and Abigail couldn't wait to climb in....and daddy had fun climbing into the box!