The tacos are delicious, as are the sopes, a kind of flat taco with a thicker, fried tortilla base. I've liked everything I've had there, especially the al pastor (marinated pork with onion and cilantro,) the milanesa (breaded, fried chicken) and the vegetarian ones with spinach, poblano pepper and melted Chihuahua cheese.
They also have bigger dishes like carne asada (grilled steak) platters, lots of burritos and the like, plus good sides -- I was a big fan of the papitas fritas, sort of like steak fries with Mexican cojita cheese.
But like Reading Rainbow, don't take my word for it -- they have four stars on 100 Yelp reviews.
And now they deliver! From 5 to 10:15pm, they'll bring their fare to you through Grubhub. I haven't tried them for delivery but I definitely plan to. And lst week they tweeted that you can get $5 off your first offer by using the code "eeo8919" at mamachuy.net.