Nav4all

Currently I　am searching for the navigation system and found one product called Nav4all. Compared with comparable products, Nav4all is more ingenious. With the mobile that support the bluetooth, you can get any information from your mobile about the location, your destination, local map and so on. In other words, your mobile plays a role as a navigation system.

I checked their website and am thinking of using it. But do you know whether it also works with all GPS receivers or should you buy one from them? Thanx