I'm currently pg with my first baby and getting confused about this. We don't have a car and don't want one, living near excellent public transport. But we often hire a car for weekends, holidays etc, and I'd feel safer having my own seat than relying on the rental companies. But are they all reliant on those surefix type systems? Because I'll need something that's compatible with different cars and that can be safely attached using just the seatbelt rather than a semi-permanent base.
I know it's a boring question but I'm really confused, what do other car-less families do?