Z Square Mall is the easiest central stop for air-conditioning, clean toilets, chain restaurants, and predictable shopping. It is not the place to find old Kanpur character, but it can be a practical reset during the hot season or between train connections.
The mall sits close to the old commercial core, so it works well as a contrast to the bazaars around Generalganj and Naveen Market. Treat it as a convenience rather than a cultural highlight.