My girlfriend and I live nearby so we've eaten at Tacos El Asador several times, probably about 7 times in total. We are pretty big fans. We haven't tried all the menu items, but we have developed a "favourite order" that is currently:
2 Chrispy Beef Tacos
2 Al Pastor Soft Tacos
2 Chicken Enchiladas
That comes to $20.30 after tax and feeds two people quite well with some nice variety between each dish. Occasionally we'll get a Jarritos but they are way overpriced (they cost $1 each at Wal-Mart at Dufferin Mall).
The place can be pretty cramped but if you get a table away from the counter it's perfectly fine. Several yelp reviewers felt that Tacos El Asador tacos are too dry. After visiting a few times, this is occasionally true, but more often than not we've found that El Asador tacos are a masterpiece. Remember, applying generous amounts of salsa to your tacos is a must.