If you're on the lookout for a smaller and simple to use GPS, the Streetpilot i3 would be ideal. More advanced users will be frustrated by the limited control set and slow calculation speeds.

The iCN 320 is a low cost GPS unit equipped with a basic features set and designed for use straight out of the box. This will appeal to new buyers who are put off by the high price of in car navigation, but those wanting more advanced options would be advised to look elsewhere.

We like the idea of a large touchscreen but the Uniden GNS 8600 is a little too big to be practical, despite its excellent features. The lack of an internal battery, slow interface and high price tag all count against what could have been an excellent product.

While not as visually appealing or easy to use as other GPS unit we have reviewed, the GPS on the 169 did its job. The PDA however, lacks Bluetooth and Wi-Fi support.

While we have seen other GPS units equipped with basic safety warnings, the Road Sense sofware on the RoadAngel Navigator is by far the most extensive and practical implementation of safety features we have seen on a GPS to date.

This tiny handheld GPS receiver includes maps, intelligent routing algorithms, an intuitive display, and can be programmed with custom data sources or integrated into enterprise applications. Quest is a good alternative to more complex location-aware platforms.

With an excellent map display, easy-to-use interface and clear audio instructions, the TomTom GO 300 has nearly all the features drivers need in a GPS system.

A large 3.8' screen and fast processor speed can't compensate for the bulky size and lack of both a touch screen and internal battery on the iCN 635. The hefty price tag also counts against this unit.

There's no denying the convenience of having a combined PDA and GPS unit, but we have seen easier to use GPS units.

A solid and portable GPS navigator.

If you spend a lot of time driving around unfamiliar areas by yourself, the iQue M5 could be a substantial time saver. It is well-built and easy-to-use, but a little pricey.

The TomTom GO 500 adds handsfree capabilities to an already impressive set of GP features.