In my city, new fast food restaurants are usually something that takes a few years to see a new restaurant appear anywhere in the city. If there's a new fast food business in town, try it out a few times to see if you might want to eat there.
At least for most people who appear up here. Last year we had two new pizzerias and Wendy's first restaurant in our town. We started eating at Wendy's now and then because it's closer than the one in the town next door and we order pizza from one of the two pizzerias as it's cheaper and uses great spices and toppings.