I found it shockingly accurate -- it gave the address of a house I can see out my window. I'm on an entirely wired connection, so I know it's not doing it via

I found it shockingly accurate -- it gave the address of a house I can see out my window. I'm on an entirely wired connection, so I know it's not doing it via any sort of wi-fi location, but perhaps my ISP lays out IPs very predictably or something.