We got our yellow lab 5 years ago from a breeder I found on the KC website. She is so lovely and has the most fantastic temperament, very placid and not bothered by anything. She is wonderful with the dc's, they were 3 and 4 when we got her and we have a toddler now too, she has never ever shown any aggression towards anything.
The only problem I have with her is the hair, it's everywhere adn it's constant, I've never known a dog to shed so much! So you should think about that if it would bother you.
She definitely wouldn't win any show awards, her coat is very feathery and she seems to have longer legs than other labs I've seen in pictures, but that doesn't bother me as we didn't get a dog to show it or for what it looks like.
We saw the mum when we got her and she had a very placid temperament too, also the lady had children and they were handling the puppies, picking them up ect, so we felt that the puppies would be very used to kids.
She never chewed the furniture, but she did eat the plaster on the wall! We had a big hole in the corner of the wall but she grew out of that and doesn't do it any more!
She was very easy to train and is very obedient, but you do have to train them well, or they will be all over the place doing what they want!
But I dn't think you can get a better family dog.