I can't help but hit up Azul anytime I'm in the Sewickley/Leetsdale area. The problem is that unless you are looking for the restaurant, you will never find it. It is in a house on a residential street and is rather unassuming. You probably wouldn't even know it was a restaurant on the off chance you were driving down the street.
I've always wondered how they stay in business because every time I've gone here for lunch, the restaurant is relatively empty (one to three tables full). Because of that, I haven't had the bad service that others have mentioned. I really like the chips and queso. I recommend the queso or guac over the salsa. Why the salsa is good, it doesn't have enough flavor/spice for me. Also, this is one of the few Mexican restaurants that charges you for chips and salsa.
I can't speak for all the items on the menu because I always get the Azul chicken burrito (served 'wet' or with sauce). It's delicious, steaming hot, flavorful and filling. You can't go wrong with this option. Everyone I've ever brought here for lunch has been very pleased with their order. I haven't had any drinks with lunch but looks like they have a ton of tequila options.