Summary: Awesome GPS, Works great, has numerous user friendly features, and is extremely accurate and easy to use. I installed the Hunt Montana SD card with all the land & property owner data on it so I could readily see where I am at while hunting no matter how far into the hills I hike,and know that I am on land I have permission to hunt on.
Summary: While it's a bit of a learning curve to just pick up and use, it's been a lot of fun for the kids and I. We use it to go geo-caching in Japan. I was quickly able to intuit the fundamentals, being familiar with other Garmin products. I quickly learned that this has so much more to offer. I enjoyed the direct link to the computer, allowing me to push geocaches directly to it and to plan my route on the computer and push it to the 550T.
Summary: Researched alot of GPS devices in this price range and this is by far the best one. The person using this is not a techie and felt that it was relatively easy to set-up and learn. The battery life could be longer and in order to have it on continuously in the car for a trip, we purchased the (optional) DC adaptor. The screen is fairly large and the color/resolution very clear.