Prices are going up, but compared to the other deluxe resorts it isn't that bad. I give everyone the same advice though when it comes to concierge. No one can tell you whether or not it is worth it. Everything there depends on personal needs and preferences. You have to decide whether or not you are going to use enough of the ammenities to justify the cost. If you think that you are going to be able to take advantage of what it offers then give it a shot. If you don't think that you are going to make it worthwhile, then take the money and spend it on other aspects of your vacation.
Whatever you choose, have fun!