You're right, jccole. The number of portable navigation systems on the market today is overwhelming, and recently, these navigation aids have started to take off. This is because the devices have become easier to use (most models today require little setup and are just plug and go), and the prices have come down quite a bit.

So how do you choose the right one for you? While text- and voice-guided directions and a points-of-interest database are pretty standard nowadays, you should keep a few key factors in mind. First, look at what types of maps are included. You'll want a model with street-level maps; also ask yourself whether you'll be using the GPS device just in your home state, nationwide, or beyond our borders. Some systems come with regional maps only, while others include all of North America, so plan accordingly. Another important feature is the display. You'll probably want to go into the store to check out this aspect; look for a color screen that you can see in all lighting conditions and angles. Also, if it's a touch screen, test it out to make sure it's responsive and the menus are easy to navigate and understand. Take a look at what kinds of accessories are included in the box, and at the very least, get a charger and some kind of mounting device for your car.

These are just the basics, but as more portable nav systems infiltrate the market, GPS manufacturers are incorporating more advanced features, such as traffic services, text-to-speech functionality, and multimedia functionality, to differentiate themselves from the competition. If you're just looking for a basic model to help you get from point A to point B, our favorites include the Lowrance iWay 350c and the Sony NV-U70. However, if you want the latest and greatest, take a look at the TomTom GO 910 or the Garmin Nüvi 350. For more information and buying advice, check out our GPS buying guide.