The Britax Marathon is a great convertible seat. It can be used for babies from 5 pounds all the way up to 70 pounds in rear and front facing positions. The Britax also has SafeCell Technology for head and neck safety and side and front impact protection to keep your little one safe. The Marathon reclines and has a plush, comfy cover to keep baby snuggly and happy. It also has 2 buckle positions and the headrest adjusts in height so it can grow with your child. The tangle free 5 point harness is so easy to use it makes buckling in less of a chore. Even though it doesn’t look like it, the Britax is also one of the best fits for a smaller vehicle. It doesn’t take up as much room front to back as most other brands, so it can fit safely in the backseat of a smaller sedan.