Looks like other people had some poor experiences here, but I can say from my experience that this place is indeed A-OK. Just nothing special.
If you're looking for decent Mexican food in an awesome downtown location, this is pretty much one of the few viable options. I found the service to be good, though the prices are disproportionately expensive in relation to the quantity of food/drinks served. Nearly $40 for a margarita pitcher and over $10 for guacamole...steep.
The guacamole was pretty decent: appropriately salted and flavor-full. The cheese enchiladas were pretty decent as well, just nothing to write home about.
I do have to say one of the positives about this place is the physical space of the restaurant and its location on E4th. In the summertime they open the windows turning the bar area into an outdoor patio-like environment. Not a bad place to munch on some nachos and catch a late night game.
Come here if you are craving Mexican food in walking distance of downtown attractions such as the ballpark/stadiums, but don't come here looking for amazing food. Go to Momochos for that.