sunbelle, the stroller makes up of 2 components. the frame and the seat. i am referring to the seat. quinny zapp, the seat is cloth material. so, u can follow the quinny zapp with the cloth together when bb is big enough to sit on the stroller (without maxi cosi car seat) from 6 mths onwards.
but for quinny zapp extra, the seat is a fixed shaped seat and cannot be folded. to keep the stroller, u need to remove the seat before the stroller can be folded. Eg, if u are at a restaurant, u either dun fold the stroller OR have to take out the seat first before u can fold the stroller.. then, u hv to put the seat on the floor/chair.
U ask the sales person to show u, u will understand better. I may not be good in explaining.