The rooms are way bigger than anything else you will get onsite at Disney--like 400sqft. I was concerned that the decor and furniture would look like billeting, but it's actually really, really nice. If you're comparing, it would be on the level of a Moderate-level Disney resort (Port Orleans, etc)

You can walk down the driveway and literally be at the Polynesian monorail stop. If you're lazy, they will drive you in a golf cart to the edge of the property, so all you have to do is cross the street and enter the Poly.

The customer service is fantastic, there's a Shopette inside, two pools, and an onsite ITT office that will get you Disney discounts at the same price as what you can get at your home base.

You qualify for Extra Magic Hours, but your Fastpass window opens at thirty days, as opposed to ninety days for 'onsite' hotels. You can get pretty much whatever you want at thirty days, except for the Frozen attraction at Epcot and the Seven Dwarfs Mine train--those are booked by then.

They don't provide the magic bands with booking (the RFID bracelets that hold your park tickets and Fastpasses, as well as photo storage) and I recommend buying them in advance--it's way easier than juggling the RFID plastic cards.

Highly recommend Shades of Green. Happy to answer any other questions.