I never used combi before but i kind of regret that i didnt get it.

The reason is:
-Very lightweight
-It enables face to face 2 ways (forward or face the person who is pushing the stroller)- i feel this feature can be used for newborns as they might feel anxious at first facing forward alone. Also this can be good for babies or toddlers who like to sleep in the stroller...

The downturn:
-Too friggin expensive...usually 1.5-2k
-Made in Japan (i know, i am paranoid but i cant help it)

Currently using chicco. So so is my comment. Bulky, and we try to avoid it most of the time...