This is the best authentic Mexican in Cleveland. Hands down, there is nothing that comes close. It is the standard to which I compare all other Mexican food. I can't get enough of their chorizo, and I always leave with some from the grocery store so I can cook it at home later in the week. The pastor is another favorite of mine, and every sauce on the table is outstanding...great flavor, great heat.
It's totally casual and there are only a couple places to sit, so it doesn't have fancy atmosphere going for it, but it doesn't need it. El Señor is the best, and the grocery store, La Mexicana, which it is tucked inside of, is great too!