I recently discovered this place. It's a clearance center, so the store is full of merchandise they couldn't sell at Dillard's proper. This means there's a lot of tacky and ugly clothing to be found, but sometimes you can find hidden gems. For example, I bought four shirts for half of the total price as one shirt at a normal Dillard's. They have sales occasionally, which means huge savings on already heavily discounted items. A great place to hunt for bargains.
Fiesta Mall is virtually dead now. There's probably 10 or less stores in the mall itself. And as of this review, Sears is slated to close in January 2018. That leaves Dillard's as the last anchor. So as a sign of things possibly to come, you might want to get in while the getting's good! Hopefully it sticks around!