Is that the button that connects to an Infiniti operator and they search for a destination for you? I've used it before.
I do think the AcuraLink service in my MDX is better, though. When I send a destination to my car via the iPhone app or operator it automatically displays on the navigation unit. With our QX30 I have to manually go through several menus to have the nav connect and pull down the address.
I've tried it but had to stop. There are just too many unnecessary steps.
My other vehicles, Range Rover/F-Pace, are literally hands free process, and much smoother, and faster. Like the above poster mentioned, I use my phone to tell these cars what to do via voice command miles away.