New GPS devices

Magellan models have improved in our Ratings, and the Maestro 4700 is now No. 2 among units that can be enhanced with traffic data, just behind the TomTom Go 930, $300. But we were not impressed with the Mio Moov S501, which ranked near the bottom of the category, and the Moov S401, rated last. The Insignia NS-NAV01 was the lowest-scoring among basic models. The best: Garmin Nuvi 260W, $200.

Magellan Maestro 4700, $220

HighsIt has clear, easy-to-read graphics with good contrast in its 4.7-inch screen. Features include voice command, spoken street names, and highway lane assist that depicts major interstate signs and junctions. It also includes Bluetooth hands-free calling, multidestination routing, historic traffic-pattern information, AAA roadside assistance, an exit guide, a help feature for emergencies, and a carrying case.
LowsTraffic reporting requires an optional receiver that costs $60. The display is hard to see in bright sunlight. The voice-command function is not as effective as those of some competitors.

Mio Moov S401, $180

HighsIt has a 4.4-inch-wide screen and features include spoken street names, a trip computer, multidestination routing, a help feature for emergencies, a trip log, and assistance with highway lane directions.
LowsTouch-screen sensitivity is poor. The confusing interface can be frustrating to use. There is no option to exclude specific roads.

Mio Moov S501, $200

HighsIt's virtually the same as the Moov 401 but has a larger, 4.8-inch screen. Features include spoken street names, a trip computer, a help feature, multidestination routing, a trip log, and assistance with highway lane directions.
LowsTouch-screen sensitivity is poor. The confusing interface can be difficult to use. There is no option to exclude roads.

Insignia NS-NAV01, $100

HighsThis is a no-frills navigator that comes at an inexpensive price. It has a 4.3-inch screen and an intuitive interface.
LowsThe battery life is poor, and the device is slow to calculate new routes. There is no detour function and no feature that lets you exclude roads from a particular route. The slow performance and missing navigational features make this unit a subpar performer.