Car Buyer's Notebook

The remaining three models, which included the lowest-ranked Rand McNally GPS Navigator ($350), received a 'Good' overall score. Prices ranged between $250 and $700.

A full list of portable GPS navigation system ratings and reviews can be found in the magazine's October issue, on sale now.

For most consumers, entry into the portable GPS market is within reach. A basic unit such as the Magellan Roadmate 2000, a CR Best Buy, can be had for as little as $250. However, consumers should expect to spend a little more for additional features. The top five devices in Consumer Reports' ratings are multitalented and include street-name pronunciation, an MP3 player, and real-time traffic reporting. Bluetooth compatibility and the ability to be used for hiking and marine navigation are also available. Consumers should note that premium features such as real-time traffic reporting may require either a subscription fee, optional equipment such as a traffic receiver, or both.

"While all the devices tested here earned at least a 'Good' rating, some are still better than others," said Jeff Bartlett, deputy automotive editor of ConsumerReports.org. "Above all else, it is important consumers understand none of these devices are perfect, and that there's no substitute for local knowledge."

Source: Consumers Union-NY