I enjoy MX Clase Ejecutiva and have also occasionally posted MX-related stuff here since the MX area died. I find MX business class about the same as AC or UA F 2/class, C/3 class. The Sony Watchman is fun and I like the food. MEX is often a zoo so the *G/Clase Ejecutiva lines are well worth it. There are 2 MX lounges at MEX but the great one is inside security near the domestic/international transition in the big main hallway. Great tamales for breakfast vs. boring stale bagels at the RCC. Buen viaje!