Hello!
Not sure about the Starwood Preferred benefits, because we have not reached the gold or platinum level yet. But we've stayed in several Disney hotels and just spent one night at the Dolphin over Memorial Day weekend before our transfer to AKL.
I thought the Dolphin was an amazing value for the location. I just couldn't believe the $151 rate (through ABA) for Memorial Day weekend. Wow. The rooms were very nice and exceeded my expectations. Upon arrival, we received a complimentary upgrade from standard to resort view. Even though we didn't have a balcony (and we usually always book a room with a balcony) the view of the Friendship boats and the water was really beautiful. The grounds were as well maintained as the Disney resorts. Picabu is one of our favorite resort quick service restaurants and Bluezoo is definitely on our list of favorite signature restaurants.
On the other hand, I could tell the difference between Dolphin and a Disney resort. The staff at the front desk were fine, but it was a different level of enthusiasm than at most Disney resorts. It definitely had a convention feel - from the other guests to the long hallways (we guessed some are necessary for the convention space.) Our pre-schooler loved the playground and the pool was very nice (and huge!) But it was also more packed than I've ever seen stormalong bay in the middle of a summer afternoon, and it had more of a party atmosphere. While there were plenty of kids and families, the guy selling the $5 cocktails from a backpack with a spout was something we don't normally see at Disney resorts!
We're a family of five (our boys are ages pre-school to pre-teen) and we really love the whole Disney atmosphere, so we probably won't stay at the Dolphin again. Things like Magical Express, hidden Mickeys, the Disney theming, Disney refill mugs, etc. are part of the experience for us. But that's not the case for everyone. So I would absolutely recommend the Dolphin to anyone looking for a deluxe resort in a great location at a low price!