We have the combi shuttle and love it! My son used the seat from birth to almost one year . The only reason why we switched him when we did since he still meet all the requirements was due to him getting upset in the seat I think he wanted to sit more up right and see out more . It's really easy to clean and carry. I know some people complain about the puzzle lock on the crotch but we have never had issues with it. We have owned both an evenflo and a graco infant seat and prefer our combi . Over all I highly recommend the seat and will be re using ours come summer when our fourth child gets here.
Re: Combi car seats?