"For the price, and the usefulness, it is a must buy."4.5 starson by GuardianS7
Pros: Basic navigational uses; including detailed map layout of streets and quick response of direction change based on where you are at. Also a easy to use interface and decent settings variations. Includes voice recognition. Very accurate street layout.
Cons: Not quite as fast interface as other models. Charging port on back verses the side of the device can get in the way. Can be hard to place easily in certain cars. Updates for device are generally in the $60/year.
Summary: For $170, it is the cheapest in the GARMIN brand (from Best Buy) and works just as well as the other models for basic GPS functionality and is great in emergencies. A couple of unnecessary quips about how it could be cooler, but as a functioning GPS device, it is top quality for it's price. *Note* I do not know battery life.