Just back from a (much too short!) mini-trip . . . CSR was wonderful!
We had a preferred king room (Casitas 3, fourth floor); beautifully decorated and plenty of space for two adults. We rented a car so I can't offer any bus info. The CM that checked us in was friendly and very helpful. Mousekeeping did a great job and our room was fully made-up & cleaned every day before we came back to the room for a mid-day break. Loved the Dig Site, and even though DH is not a pool person, we *both* had a blast on the Jaguar Slide!
The only negative to mention was some of the service at Rix (the grab-and-go section) . . . we often felt like we were seen as an inconvenience to the CM's because we were interrupting their social conversations in order to receive our baked goods or pay. I can't really describe it any other way except to say that going there felt very un-Disney . . .
Other than Rix, CSR was perfect!