I've seen these around my area. In theory, it's great: replace strip malls with medium/high density housing and walkable retail.

In practice, the units are always high-end condos or expensive apartments, with nothing but nation-wide franchise shops in the retail space. And they come with a colossal parking deck in the rear since you're likely car commuting at these prices. It's neither for local business, or to create a walkable community, or to help with affordable housing. If anything, it's purpose built to be attractive for people looking to downsize from a detached home.