I went here once in August 2013. I haven't eaten at a Taco Bell since the pink sludge thing hit the news, not even sure what year that was, but I read they stopped adding it to their taco filling.
The place is kinda worn inside but mostly clean. The service is somewhat slow for a fast food restaurant. There were only two people visibly working there, which was a bit odd considering how busy it was. It cost about $3.30 for two of their cheapest tacos to go. I waited about 11 minutes, or maybe it just felt like 11 minutes.
I first went to Taco Bell in 1975 in Texas, there was nothing similar around chicago back then that I ever saw. Taco's then were about 49 cents each.
Now I see that a normal taco is no longer on the menu, so prices have tripled for the equivalent meal.
Maybe I'll go here once a year and from now on I'll use the drive thru instead of walking inside. It's just a little bit 3rd worldy inside.