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.
Summary: The unit was marketed with the ability to save tracks and view them later on your own computer. It is the main reason for my purchasing the device. It turns out the tracking file is isn't written in the industry standard GPX format.
Summary: Very easy to use. Lightweight; use lanyard to put around your neck. Preferred it over complicated GPS unit when finding a survey marker 1300ft thru the woods by using its compass mode & # of yards (steps) we needed to walk from stake I "marked" with it at the road.
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...