Two years ago we stayed in Valladolid. We dined at the Meson del Marques, which had good food but poor service, and at La Campana which had mediocre food.
This year we were in Valladolid again, and Dennis, the owner of Casa Hamaca where we stayed, gave us some suggestions. We ate at a couple of those places, and they turned out to be quite good. I thought I would share our experience, so that travelers know that their are other options beside Meson del Marques (As Dennis said, forget Meson del Marques when there is a tour bus there.) They are not gourmet quality, but we went away very happy.
The first place was across the street from the San Roque Museum. I forget the name but it started with a "Y". (Maybe someone can help me out on that.) When we walked in it looked like a hole in the wall. There were no other customers, which made us a bit leary. We went out to the terrace in the back which had a nice view looking out over what appeared to be a filled in cenote. The tables on the terrace were not set up, but the staff quickly prepared us a place. To drink we had an "horchata" milkshake. We all like horchata (a beverage made from rice) but the milkshake was even more delicious. There were four of us, and for an appetizer we ordered 2 different kinds of nachos. They were delicious and unlike any nachos we've ever had in the U.S., loaded with tasty shredded beef. The portions were enormous, and a plate of nachos could easily make a satisifying main dish. However we did order main courses as well, and everyone was pleased with their choice. I had the "poc chuc", and although the meat was a bit tough it was very tasty. All in all a good experience, and we went away happy and full for a very reasonable price.
The next night we went to the restaurant that is perched above the Zaci Cenote a couple blocks from the plaza. I must say that the service was excellent (granted, the place was nearly empty). We had the attention of 3 different waiters. One of them was 11 years old, very polite and attentive, and could give a lessons on service to some waiters in the U.S.! We ordered drinks, and out came a half dozen bowls of "botanas" (free appetizers served with drinks). All were simple but very tasty. As our main course we ordered the Yucatecan platter for four. Out came a HUGE platter with eight different Yucatecan specialities. There was enough there for each of us to have good sample of each of the eight dishes. All of them were good... some of the dishes such as the stuffed cheese I've had better in Merida... others such the "lomitas de Valladolid" were excellent. All in all it was a very nice introduction for the traveler to the dishes that are unique to the Yucatan. As an added attraction, at dusk we were able to watch from our table as the bats came out of the cenote. (Don't worry, they don't come near the restaurant.)