They have great prices and great sales! I've gotten one bridesmaid dress, a wedding dress, and a veil from this store. However, there are several caveats to this place that some people have already mentioned.
-They can get pretty busy and you might not get a lot of help. I don't need to be waited on hand and foot so I could care less about this most of the time. However, when my bridesmaid needed to ask someone about possible rush charges, the guy behind the counter didn't know and he told us to contact Azteca 5 days later when the person who handles this was back in the office. This is extremely unhelpful if you are on the borderline between regular delivery and rush delivery.
-The dressing rooms are pretty flimsy and you sometimes feel you might expose yourself on accident.
-Alterations here seem a bit difficult because of the language barrier. Will probably get it altered elsewhere.
The good things are:
+affordable prices
+unpretentious attitude of the assistants, the girl who helped me find my veil was helpful and very friendly
+wide selection of dresses