I just got mine yesterday, I reported in another thread that it was within 2 feet in a steak and shake parking lot and it was. I posted that on my mobile while waiting for my food. I pinged it again in the same place 45 minutes later and it was off 23 parking spots to the north. I am actually kind of disappointed here on day two and scanning for the other post I made to edit for accuracy of my feed back.
As far as directions, just call the # on the paper, wait for any kind of an answer and hang up. It will email and text within a minute and give the lat. lon. and battery % and a link to google earth and you will be advised with in 2 to 250 feet of your tracker as best I can tell. . All for now.
P.S. if you ping it in a moving car, it will make it's mark maybe 15-20 seconds after the call is answered. Can be off a 1/4 mile in this case and you will need to ping it twice to understand direction of travel. I used the supplied velcro to attach under my battery box on P2, this is less than perfect as I have to remove it to plug in if I choose to instead of pulling the SD card.