We're just off the Fantasy and the open houses didn't bother us. In fact my girls LOVED the time in the club with and without us. My DDs are little and I was worried about bigger kids running DD 3y/o over- or trying to pick her up like a doll (she's really petite), but the CMs had it all under control. I don't know for sure, but it seemed like b/c we were off season there were fewer kids. Maybe in the summer we would have felt it more. The club never seemed super crowded. It seems like the older kids would complain about this more that the littles, and they are the ones who can check themselves in and out during OH. The bottom line for me is, whatever the rules or OH hours, our family will adjust and I don't see it making or breaking the cruise for us.