Right now the gps in my computer is right on. That isn't always the case. Sometimes it will show me 3 or 4 miles from here.
I have a Samsung phone with Onx and a Garmin Montana with an Onx chip. Using them side by side, the Montana is considerably more accurate, often within 3'. I've had the phone be off by 20' or more. For 99% of my uses, the phone is accurate enough and a lot more convenient. I've set up orienteering courses where I have to use the Montana as it's more reliable.
