I have seen car seats that you can use from newborn to 4 years old. Obviously this seems to me to be much more economical than buying infant carriers that last till 9-12mths and then buying another car seat for toddler age.
But obviously these 0-4yrs seats stay in the car - you can't carry the baby into the house in the seat (eg if they are sleeping). Also, are they as safe?
I like the idea of having seats that don't move out of the car cos then I know they are always correctly fitted. If i was to have infact carriers I'd want ISOFIX which is another £100 (£200 for me with twins) as well as £100 each for the seats as well as £150-ish each for the toddler seats.
Infant carriers plus ISOFIX plus toddler seats = £700
newborn-4yrs seats = £300.
So is being able to carry the baby into the house while asleep that important? Is it worth £400? I don't think I'll be going out in the car much anyway as I live in a nice little village with everything close by. I'll only be taking them on longer journeys of an hour or so to my mums etc.