Daytime staff is pretty rude. Was asked to get out of the drive thru when trying to order tacos because they thought I wasn't a customer. Weird. They run a fast joint but plenty of taco stands in az silk manage to provide exceptional customer service. The street tacos are outrageously priced for being street tacos and the burritos are overpriced too.
I highly recommend Tacos Mich. It is way more authentic. You won't find any Hispanic people in line at Speedy.
It's ok for a late night snack. Don't recommend if looking for good Mexican food.