I like my Britax Marathon. I liked that you can use it for so long and that it can be rear-facing for longer than many convertible car seats. My daughter seems really comfortable in it. Actually, we switched to it at 4 months, because she hated reclining in her infant seat. She would cry for the entire car trip and try to strain her head so she could see out the window. When we switched to the Britax, she stopped crying. Turns out she just wanted to be more upright to see the world. There is also enough padding around it to make it comfortable for her when she is sleeping. The only down side is that it is so big, but it does still fit in our little Honda FIT.