I just wanted to get some opinions on a disagreement DH and I are having about some car seat logic. We are moving DD1 to a convertible car seat this weekend and he thinks we only need one and that we can just move it back and forth between our two cars. Now I've never installed a convertible and we're moving DD1 from the infant seat-which was lovely-but I think it's going to be a pain and suggest we get two seats. Am I right, is he crazy to think this way? It's not just a matter of clicking a seat into a base anymore-or am I missing something and it is easy to move? Thanks in advance!