The taco shop was great. I don't have much, or any, experience with mexican food but it was delicious. And the staff there was super friendly if a bit... well... bulgarian :D I was with a friend and we were talking about Taco Bell and a woman of the staff said "Yes, we have that too!!!"... :D Maybe they are trying a bit too much, but it's an interesting place. 
I went there two times in one day and they remembered me and gave me a complimentary little dessert. :) I'll be sure to go there again.

Talking about Shishman str. have you tried Supa Star?