Just got back from there, and agree that it is a beautiful and well-managed resort. Many restaurants on site;a really good Asian theme and a new tapas restaurant, but the portions are huge. Hidden Beach Resort is literally steps away from Seaside. In the area, the Tulum ruins are a 20 minute drive, and Chichenitza is about 90 minutes away along with some cool cenotes. Snorkeling and scuba off Cozumel are world class.