At this point I've only been to this place once, but it seemed, in the words of Yelp, A-OK. Because it is very close to home, we might walk over again some afternoon when we don't want to cook and happen to have some extra cash.
Service was fine. Simple order & pick-up model, so not much interaction. The cashier was doing some other work back in the kitchen area and let us know to call when we were ready to order.
The menu is pretty extensive, with lots of different meat options for the various entrees. Prices were fair and the food was all right. Nothing stand out. Really, just fast food. Like Taco Bell, but Mexican (yes, Taco Bell is NOT Mexican food). The horchata was OK, but the jamaica was delicious.
As a vegetarian, this wasn't my Mexican place. There are some I have found with ample bean and veggie based dishes, and then some fish to supplement (if you swing that way). Taco Mich didn't really provide that, but, then again, it's usually "trendy" places that amp up the veggies options. And Taco Mich isn't trendy, but solely functional.
It's convenient and cheap, so if that's what you're looking for, give it a try.