So I'm pondering infant seats for the newbie due in June. I'd like something long lasting and easy to install baseless, as I go in other people's cars on a regular basis. I'm thinking of the Combi Shuttle. Does it fit those wants? I love the Chicco Keyfit, but not sure it would last as long as I'd like. I've also considered a Cocorro, but unsure about easy install. Any thoughts on those or other seats?