We booked my 40th at GF Concierge Level--what a waste. They were rude and didn't even acknowledge my birthday although I told them and wore a birthday badge.
You're better staying at Poly Concierge. The people are wonderful, the breakfast, snacks/desserts, cookies and h'orduerves are outstanding. Also, there is a surprise in your room that is quite good. Be sure to ask for a lagoon view to see the fireworks and/or lagoon parade.
Happy 40th!