There are controlled burns, and there are wildfires. Los Dos is the latter. My wife accurately described this place as being both the best and worst experiences she's had at a restaurant. The food was delicious, but the burn was ridiculous!
My boss has taken many pregnant women here (who are on the cusp of delivery), and after eating the spicy food here, nearly every single one went into labor (not immediately, of course, but within a day or two). Pretty wild.
My only complaint is with the service being a little lousy/forgetful. But on the other side of things, the owner did come by and help and chat for a while.
Be aware, you can still eat here if you can't handle spicy food. Just avoid the salsas at the beginning and you'll likely be okay. Order an horchata just to be sure. But one thing is certain, you've got to try a plate with adovada ( marinated pork), especially when a fried egg is included. One of the best mexican-style plates I've ever had.