First off, it's worth noting that you're not dining outside on the rooftop (slightly misleading name, but it's because they built an enclosed dining room on the roof). You CAN step outside from the dining area and be out on the rooftop lounge area / bar.
The service was fantastic. I had made a reservation online and checked a box to indicate it was to celebrate our anniversary. Upon arriving and checking in, the hostess congratulated us on our anniversary. She showed us to our table, and then our waitress came over and congratulated us. That alone felt special, but truly the whole night was awesome. Staff were very attentive, helpful, and knowledgeable.
Food was delicious, see pictures. We had the Texas Salsa, which is less of a traditional salsa and more of a "cowboy caviar" (just a wonderful selection of fresh things minced up and mixed). We also had the Chicken Paillard and the Cheesiest Cheeseburger for main entrees.
Atmosphere was classy and detailed, yet relaxing. Joanna & Chip Gaines really outdid themselves on this project. Waco really needed something like this!