I will also echo the rave reviews about the spa! We also just got back from Aulani.
DH & I did the couples massage the second day we were there and totally started the vacation out right. It is total relaxation and well worth the price. Keep in mind they tell you to arrive 1 hour prior but I recommend to take advantage of the outdoor facilities and spend as long as you want. In reality if you want to arrive at 8:00 am for a 2:00 appointment and leave at 8:00 pm you can and just relax in the outdoor garden area as your own private pool area. It will make the cost worth it. We arrived at 1:00 for 3:00 appointment then left at 7:00. I personally felt this was more bang for my bucks then getting a cabana.
I do recommend making reservations as soon as you can. As izzy said make sure you do not get a sunburn before getting your massage.
We also toured the spa the night before which helped get to know the layout before arriving for our massage. They did tours everyday at 8:00 am and 7:00 pm. Also keep in mind the
DVC upgrade discount. It helps only on upgrades and does not give any discount for signatures treatments.
Enjoy! Still in