There are seven hotels that share shuttles. They operate two different "sides". The "A" side is for the Hilton Lake Buena Vista, Holiday Inn Lake Buena Vista, B Resort and Spa, and the DoubleTree Suites. The "B" side is the Best Western Lake Buena Vista, Wyndham Lake Buena Vista, and Hilton Buena Vista Palace. As all the hotels are adjacent to each other, having to stop at additional hotels isn't as bad as it sounds. I find it more convenient than one of Disney's moderate resorts where the multiple stops are spread out over larger distances.
Each side runs two routes that depart every 30 minutes all day long. In my experience, the shuttles are very punctual. Although it can change based on operational reasons, it's usually one bus that goes to Epcot then Disney's Hollywood Studios and a second that goes to the Transportation and Ticket Center then to Disney's Animal Kingdom.
The shuttles are run by Mears Transportation. Mears is the long-time Disney partner that runs Disney's Magical Express and transportation for
Disney Cruise Line.
Here is what is provided at check-in:
A few years ago, Wyndham split this property into two separate hotels within their booking system. Both hotels share the same common areas: lobby, restaurants, pool, and transportation.
The Wyndham Lake Buena Vista (no "Garden") is the main tower. It has interior-entry guest rooms. The Wyndham Garden Lake Buena Vista consists of the outer buildings. They have motel-style, exterior-entry rooms.
From what I've read on here and places like Trip Advisor, you will want to avoid the Garden. The rooms are smaller and have not been adequately maintained over the years.