However I can confirm that not all the information contained in it is correct. At least in my area the terrestrial repeater it shows as being there is not there... I think it's 60 miles away from the registered address from rumors I've heard.
i really don't know if they are all that effective. i live in a city that has a repeater and i have trouble picking up signals when my stilleto is not connected to my car dock, especially indoors in buildings less than 2 miles from the repeater site.