Better go early to this awesome taqueria. Line was jumping from the break, but well worth it. Be careful with the peppers on the nachos, slow burn stays with you for a bit. Cash only so be prepared in advance.

Showed up late afternoon for lunch and there was still a long lineup but it moved quickly. Service was quick. Tacos were excellent. We tried the beef and pork tacos with chips and guacamole and all was excellent. Loved the atmosphere. Even had a mariachi band playing. Would definitely return.

The tacos were well worth the wait and sitting at a tiny table! Best ever. The carne asada was outstanding.

We've been doing a road trip around california and love Mexican food. We took an uber down to mission as it was too far to walk from Union Square but it was well worth the fee there and back. The food was fantastic and so much better than anything from San Diego and also a great price, a 2 huge burritos, a drink and nachos was under $20. If you like Mexican food and you are staying in San Francisco then this place is a MUST. Just be prepared for long queues and having to sit anywhere there is a free chair (and bring something warm to wear!)

What is there to say. Best is best.
Yes there is a crowd, yes it's noisy, yes they might get an order wrong but...
yes but...
this place is the gold standard for fast Mexican food. Not Mexican "Fast food" but really good, really fresh, really right tacos and burritos.