I have a lovely 'from birth' pushchair, but it is very bulky. I have therefore bought an umbrella pushchair for in the car. I have sat DD in it, and she looked very comfy - no more upright than her car seat, it supports her head and back quite well, and she has good neck strength. She is 14 weeks old, and is a big baby.
I obviously do not want any harm to come to my baby so would I be very wrong to use it on the odd occasion?