Summary: A great GPS for a great price. I use a GPS in my work, for travel, and hunting. I really like the big touch screen, expanded memory compared to other models, and the improved sunlight readability. The electronic compass is very useful. Of course the SD card enables me to use many free Garmin compatible maps downloaded from the internet. The sensitive receiver works great for aquisition time and even in buildings.
Summary: As an avid photographer, I use this GPS for geotagging my images with location information after the shoot. The Oregon 300 allows me to do this easily. I simply synchronize my camera's clock with my GPS's clock, create a new tracklog which updates at 1 second intervals, and start photographing.
Summary: I bought the Oregon 300 after a year of fighting a Magellan Triton 500. The last straw was the Triton becoming a paperweight during a firmware upgrade. Anyway, after getting a replacement Triton I tested the two side-by-side, both loaded with topos of an area with which I am familiar.
Summary: Bought this for my Garmin 300 to attach to my KLR650. I've put it through a few rough offroad rides and have have zero problems with the mount slipping and my GPS was held securely the entire time.
Summary: I am liking my Garmin Oregon 300 very much. I had a Megellan but was unable to download "geocaches" from their web. It is much more user friendly than the Megellan. It was recommended to me by a friend and I am very satisfied.