it folds up lovely and small, my cousin gets hers in her saxo and the boot is tiny.
the wheels slip off very easily so can go even smaller, one slap of the handle and it collapses down even has a strap so can carry it on your shoulder.
i think for a newborn i'd have the carrycot personally as having a yr old, i used my pram to put rhys to sleep in in the day, didnt like the thought of him being stuck in a car seat esp when there is a time limit how long a baby can be in a car seat, plus not very warm in a car seat if your walking in the street esp if you get caught i the rain.