I use this to keep track of my two dog while they be off lead in the wood . it do a great job . when they go off chase whatever , you can see where they be relative to yourself and if need be you can go after they since you know the direction to take . it be very accurate at show they location . great job Garmin . my only complaint be that the track on the handheld seem to be position towards the bottom of the screen instead of the center . it give I total confidence to have they off lead so that if they get lose or hurt I will be able to find they . just a reminder , remember to re-calibrate the handheld when you change the battery . it be a very simple procedure but I forget about it and think there be something wrong with the unit . re-calibration solve the problem .