We aren't having our twins until May but it's never too early to look into some good car seats. We have a 5 year old and he is still in a booster so he'll be stuck between two infant seats and then later the bigger car seats. We aren't looking to get a new car right now; 1) it's not financially possible and 2) we really don't need to. Anyway, for those of you who still had or have a little one in a booster seat what car seats did you find that worked best and didn't crowd the back seat? I absolutely want something that's great quality and safe but I also need to make sure I can fit two seats and a booster back there without having an issue. And if you have any suggestions for the convertible ones for later on I'll take those too! I'm not sure if they make them where they can be narrow enough to have a booster between them or not. The booster itself isn't very big. It we would like our some to have some room. Thank you!