Taco Guild gets points for atmosphere and style but I'm not impressed with their food. These are "gourmet" tacos with lamb and peking duck(cough), but I didn't find them any good for the price. I prefer La Condesa for this type of fancy tacos. For real street tacos, stick to holes-in-the-wall or stands/trucks. Given that, the old church setting is actually kind of cool and worth a one-time visit.