Very good family dog. Puppy's going to have a LOT of energy though. Are you okay with drool for the next 10-15 years? (See my profile pic to see my boxer at age 8). He was still QUITE the 'puppy' at even 11 yrs old before I had to put him down this past August. He could barely walk, but would still "jump" with a puppy type of excitement each morning when he saw us.
How old are your kids? My 2/3 yr old was always at perfect height with being face-to-face with the boxer. He got licked a lot.
My boxer was very quiet. He'd only bark two instances: a 'bad guy' and 'I'm hungry." Both very distinct barks. I have met one other boxer that barked at strangers. Annoying. I am not sure what the norm is on barking. Maybe I lucked out with a quiet dog. Mine whined more than barked.
@ comment about them being dumb: My husband would agree. But he met my dog when my dog was 8. My dog knew how to sit, shake, go to his kenel, stay, and that's about it. He was very gentle. Never aggressive. I have read that boxers were originally bred for companionship for military. I would agree that they make great companions. Not super-obedient or amazingly intelligent, but not the dumbest dogs I've ever met!