Originally Posted by
Joolsplus2
Yup, back is loose, yup, LATCH is loose(r than an installed seat), yup, the clip is optional (as long as the seatbelt is low on the hips, if it's riding up on his belly, which I think is quite unlikely, then the clip should be shortened and used to hold the seatbelt down.)
Boosters are a whole different animal, aren't they? It can take awhile to get used to them. The first hard brakes you make might find him flying forward an alarming amount, he's just not used to holding his body up, but pretty soon he'll learn ride with the car a little better.