My kids have been to the Neverland Club a number of times. They love it. They've also been to the Sandcastle Club at the BC and Simba's Clubhouse at AKL. They loved those too.
It is true that each are a bit different but nothing major. They all have games, crafts, toys, dress-up, video games, movies, etc.
Our kids have always wanted to stay when we've gone to pick them up, no matter how long they'd been there. It is now an expected activity and we work it into our schedule. DH and I don't mind, we get a quiet leisurely dinner at a 'grown-up' restaurant.