Well, we have only tried the Poly concierge, but we loved it! The lounge is great, great views, great food. I like the fact that it is open all the time. Now, for our August trip we took the advice of KerryCM and Elisabeth and are trying BWI concierge for an adults only trip, but we are going back to the Poly concierge in December with the kids, we liked it that much!! I have heard that the AK concierge is wonderful and that the BC planning staff is great, but that the lounge at the BC is very small.