Summary: A great GPS. If you are in the market for a GPS receiver, the 315 offers a great price, low weight, efficient battery consumption, and all the features you'll need in a basic GPS. Despite its low weight, the unit's durable construction means it will take a beating. The features are simple to use and this receiver has all of the basics that you need to navigate in the outdoors. This quickly became a favorite receiver for the GearReview.com staff.