The Chicco Key Fit is incredibly easy to install in many vehicles, which can help make it a safer choice since proper installation is key to safety.The Key Fit 30 can be used for babies up to 30 lbs., so you should get a longer useful life out of it. Key Fit has liquid leveling indicators, an easy to find belt-routing area and a secure locking system that makes it easy to get a tight fit without LATCH. The center-pull LATCH adjuster makes LATCH installations incredibly easy. Chicco Key Fit is also fairly lightweight, which is nice if you intend to carry it outside the car a lot.