If you like cheesy, greasy, crunchy, hot American-style Mexican food you'll get it here.
But the store management needs improvement. The place is run down and has barely gotten a facelift in the last 20 years (some broken chairs fixed this year). The staff need to do a better job at cleaning up and making the place presentable.
Food is usually done fine, but not always. Portions are average. Price is fine.
Waits are long, especially if you go into the store. Drivethru can be long too. They are understaffed and it can take time to even get served. Amount of customers has definitely gone down over the years probably because of service and the availability of more authentic Mexican food.
If you want a real Mexican meal, go to Burrito Boyz - preferably the one on lakeshore. I come to Taco Bell mainly because it's close by, affordable, satisfactory (you get what is advertised), and the fries supreme is unique. You can't get a fries supreme or a taco at too many places in Mississauga. But you can get better burritos and quesadillas.