Summary: This thing will get you killed if you get lost easily. When it would finally track down a satellite the compass would not hold north. First pointed NE, a minute later NW and than due west. Did not matter what we did, could not find north. Most of the time we would turn on the unit in a large open area and it could not find a satellite. I would give this zero stars if I could.
Summary: I bought this for a camping/on-the-road trip for my Fiancee and I. I tested it when i got it by marking my house, and walking to my mailbox. It worked for what it needed it. My only complaint is that you have to hold it flat/parallel with the ground. I guess this goes with being a compass based item. If you don't the arrow just points in random directions. That, and the fact that it takes a very long time for it to initially get it's connection.
Summary: The receiver is quite weak as it fails when I get close to my 4-story work building in suburban Silicon Valley. So, I imagine this is probably of no use in urban canyons like NYC, Tokyo, and parts of San Francisco.
Summary: Accuracy of the 3 points you can input in varies. It was off by as much as 20 yards at times. So for things like geocaching, it might not be accurate enough. But for finding your car in a gigantic parking lot, or when used in conjunction with a topographic map, or when there are foot paths, or you're at a park without a map, it's more than accurate enough. If you're really out in the middle of no where, I'd still insist on a proper Suunto, and topographic map.