Julie, I thought I'd give you some info that was taken directly from the
WDW website (that link is to the GF webpage):
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Concierge Service:
Some rooms offer concierge service at the Royal Palm Club and Sugar Loaf, which includes personalized front desk and guest services. Make-up mirror, turndown service, and lounge with continental breakfast, midday snacks and afternoon tea are provided by both Concierge levels. Sugar Loaf also provides a Twilight Refresher in the evening. Wine, cordials and dessert are served at the Royal Palm Club only.
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Is it worth the extra money? Yes. And no.
If you plan on asking the concierge to make a majority of your PS reservations, then it might be worth it for the convenience. However, if you like to make all your own reservations, then you really don't need the concierge.
The concierge lounge is a nice place to grab a snack in, but you cannot make a meal out of it nor is that the purpose behind the lounge's food offerings (with the possible exception of the continental breakfast offerings).
Sometimes the concierge rooms are larger than the regular guest rooms, but usually they are identical. Sometimes they have a nicer view, sometimes they don't. Sometimes they are located on an exclusive floor of the resort, and sometimes they're not.
If you really want to experience a concierge stay at least once, then by all means do so. Disney's deluxe resorts all have concierge rooms available for booking. I have stayed in concierge rooms at the GF, the CR, the YC, and the AKL. In my humble opinion, the AKL has the best concierge staff around.