Kids are fine in Concourse, but if your going on v-day I would suggest and earlier ressie. We had a bad experience on our honeymoon at Concourse, because we were seated next to a 2 or so year old at 8:30 who was well past his prime. I wouldn't have minded nearly as much had we had an early dinner but with dinner that late he was pretty much the only child in the resturant and was not behaving in a resturant manner. I'm not saying all kids shouldn't be allowed just take your child's weaknesses into account, especally since even in Disney I'd be willing to bet there will be a lot of couples who spent the money to leave their kids with babysitters since it's v-day.
Melissa