I've been to Bel Air Cantina 3 times in the last two months. Twice to this location and once to the location in Wauwatosa.
Tacos are my favorite food so you have to mess up pretty badly to disappoint me in other words...
I've met few tacos that i didn't like. I will say I prefer the Margarita to the Paloma... which has very little grapefruit flavor compared to other palomas I've had in the past at other watering holes. As far as happy hour goes... there is a margarita upgrade option during certain times where you can get a higer shelf tequila for the price of the well tequila... not super thrilling.
As far as food goes...I prefer the Pollo Verde to taco to any of the other chicken offerings. I did however enjoy the fish taco I tried on one of my visits as well. If you order 3 tacos you get "free" rice and beans and if you ask for just rice they will oblige.
Overall I've had great service and i have been happy with the promptness with which my food was delivered even during busy times on Taco Tuesdays. i'm sure i'll be coming back soon.