Neverland Club is the best of them, of course, big, perfectly themed, and with a private "kid's buffet." Cub's Den was a little spartan, but DS was only one of 2 kids there that one night, and he still had a lot of fun, because he liked the "teachers" that were on duty. Harbor Club is very open and welcoming, though not very heavily themed; the helpers there were especially nice when DS was there, and rather young; usually they are a bit more grandmotherly (by "young," I don't mean teens; I'd say they were in their late-20's to early 30's.)
One caveat about Neverland Club: the entrance can be a little intimidating to a child who has never been there. You cannot see into the playroom from the registration area, which is a desk shaped like a child's bed, and it's dimly lit. The lady who was doing registration the first time DS went was a little stern, and she frightened him--he thought she was going to make him go to bed, as that was all he could see, so he did not want to stay. Finally, one of the ladies from the play area came in and left the door open behind her for a few seconds; one glimpse was all it took, and he was off like a shot!
Yesterday, over Easter dinner, DS' big exciting news for Grandma was that he is going to get to go to "the Peter Pan Club" *two* times when we go to Disney World! (DH and I are doing an e-night, and also going to dinner later in the week.) Last time he went to the Neverland Club; it took us a full hour to cajole him into leaving; he had to show us *everything.*