Mooon is watered down mexican food. mas lami toh before under original owners because the original ambiance and concept was laid-back dining. Now it is more of a social hangout than a dining destination.
Bigby's is good but prices are kindda high. Great for the once a month payday dinner but not for weekly meals there.
If eating is in my mind, I'd go to Bigby's. If with a group of friends and talking and drinking is in the agenda, I'd go to Mooon at Guadalupe branch.