This placed opened last Wednesday. I stopped in today to check it out. While I wouldn't recommend making a trip here from outside the neighborhood, it is a nice addition for those of us who live and/or work nearby. They had tons of fresh-looking produce, nicely displayed and for very competitive prices. Cilantro was 3 bunches for $1.00. Green Onions were 5 bunches for $1.00. The place was absolutely immaculate - hope it stays that way. Aisles are wide, also a plus. Meat/deli, and frozen areas are pretty small, but canned/dry goods are fairly well stocked. Mexican seems to be the nationality most represented by the "international" in Mayfair International Market, but there were some Asian produce items, and Indian, Thai, and Eastern European items in the dry goods section. I did notice they have the full range of El Yucateco hot sauces.
I forgot to look at the exact address, but it is steps away from the Lawrence and Pulaski intersection.