An adult can fit between 2 car seat but it’s tight, ive got 2 booster seats in mine so I’m not sure about baby seats.
I’ve got the B4 engine so 197bhp, I wouldn’t call it a quick car but I wouldn’t want anything less otherwise I feel it would be underpowered for my liking and after 1000mile I’m averaging 27mpg mixed motorway and town driving
i haven’t driven the q3 so can’t comment but it looks ok