The first time we stayed at the Poly, which was over a decade ago, I thought it was almost as nice as the GF. However, our last visit was such a letdown that I don't think we'll be back. If you like the island theme, it is well-executed. The rooms are also quite large. The beach is pretty.The transportation options are excellent. Beyond that, the negatives were significant:
1. Customer service was cranky at check-in and non-existent after that. The CM told us we were "late." (Our cab never showed up at MCO). After that, we did not hear from one cast member for the whole trip. Even the mousekeeper never left a note or any indication she'd been in our room. That trip included our anniversary which we had indicated when we made our reservation. Someone slid a congratulations certificate under the door. It felt really impersonal. At every other WDW property we've visited for our anniversary, we've gotten adorable, personalized notes from the management along with flowers, chocolates, champagne or cake.
2. The public spaces are crowded and not as inviting as other deluxes. I like the Volcano theme of the pool, but it was super crowded and not clean. There were bugs floating all over the surface. It was gross. Some people say the crowd problem is because non-resort guest pool crashers prefer the Poly. That could be, but I don't know. The pool has no hot tub. There is no fitness center. The lobby is small and dark. The stores in it didn't have any merchandise that really attracted me.
3. Dining choices are not as good or as high-end as other deluxes. Capt. Cook's is the least impressive CS I've ever had. Kona Cafe feels like you're dining in a mall because it is smack in the midst of the lobby. Ohana is family style dining with a limited menu, so the property really doesn't have a fine dining option. The Spirit of Aloha Show food is mediocre and expensive. The show is interesting, but if you have small kids, they are going to find it very long. Also, you hear the Spirit of Aloha music and drumming as you walk around the property which kind of got to me after a while.
I'm glad I stayed at the Poly once because it is one of the oldest WDW resorts, but objectively, I think you can find a better deluxe resort for the same or less money.