Maya Grill. A bit more upscale than your normal moderate resort restaurant, but that is due to the convention center at CSR. We have always enjoyed our meals there, and it's usually open for ADRs and walk ups.
In all the years we've stayed at CSR (seven times), we've only eaten at Maya Grill (table service) for breakfast once (it is a buffet--no better and no worse than any of the other Disney breakfast buffets) and have never done dinner. We hope to try it on our next visit. Here is a recent review from someone who stayed at the CSR: http://www.disboards.com/showthread.php?t=2113614&highlight=Maya+Grill
I stayed at CSR last week. Maya Grill has a Breakfast Buffet this is mediocre
but they have good Dinner options. I had the Filet Mignon and it was good. Sorry no pictures.