Can the Ninja machines really make good cold brew?

Across specialist-community discussion, owners of the Ninja Luxe Café and Ninja Specialty line speak positively about the rapid cold brew output, with one r/espresso commenter calling it the best cold brew they'd had. These are multi-function machines, though, so you're paying for hot coffee, espresso, or frothing features alongside the cold-brew mode rather than a dedicated cold brew device.