My daughter loves to use the shield to play with toys. It allows them to rest their head on it when napping instead of their head just hanging to the side or straight down.The only bad thing is that if they are napping when you need to get your child out, the straps that come over the head sometimes make it harder to remove them out without awakening your little napper.This is the only reason I didn't give this seat 5/5 rating.
Over all it would be a good car seat. But my child ended up not enjoying the shield. I had to buy a new one with out one. It is a pain in the butt to take apart and wash. I just wouldn't but it if I knew that before hand.