I liked one world because of the different style of "Family Grouping" in relation to age. My boy is very quiet and the concept of him being in with babies and older kids seemed to make sense - and he really enjoyed it. It means that just like a family you do not have a room full of babies or 4 year olds but an even spread of all ages. I think if you have smaller children though you might worry with little ones in with older kids. I thought the receptionist was excellent but managment were probably sometimes a bit insensitive to the kids needs. But the girls in the rooms were great.