OKW is in a really nice location.
It's only about 7 mins to Epcot, 11 mins to Magic Kingdom, 10 mins to the Studios, 15 mins to DAK, and 5 mins to Marketplace.
Old Key West is never typically a demand resort, so busses are rarely crowded. Busses run typically every 15-20 mins, give or take. Usually, when I'm driving Old Key West, as I enter the resort, my counterpart is just leaving. And when I'm leaving, they're just coming in.
There are 5 stops within OKW.
The usual order is: Peninsular Road, South Pointe, Turtle Pond, Millers Road, and Hospitality House.
Downtown Disney is a bit different... It goes into Hospitality House first, but as an Internal Resort Shuttle. It then changes back to DTD, and goes to Millers Road, Peninsular, South Pointe, Turtle Pond, and back to Hospitality to pick up for DTD.
The reason for this is as follows. Anyone can pick up any bus and it'll take them to the Hospitality House. You can then take the Internal Shuttle back to your stop.