Summary: I do like the large screen my laptop provides for navigation. the small screened navigators are a hazard to me. Other than having to deal with Garmin, their customer service is as bad as it comes, the product does what it is advertised. It locks on to the sats fast and acurately.
Summary: The USB version of this GPS receiver is the usual high quality of a Garmin unit, but it does connect to a computer in an unexpected way, so be careful when buying this unit. Most "hockey puck" USB GPS receivers create a COM port on the computer, which makes them very compatible with mapping programs and other GPS software applications. The Garmin 18 USB creates a new DEVICE in the Windows Device Manager and does not generate a COM port for your use.
Summary: This is not a haldheld but for use in a car or other vehicle. Works perfectly. Drove all around in Florida using this. The fault with using a laptop as a navigational tool is that it is a fraction slower than the dedicated units so when the computer says 100 meters to next turn you have managed to drive a large part of that distance Baldur
Summary: Don't attempt to operate this system on your own while in motion! Everybody accepts the disclaimer at the opening of the application, but you simply can't be looking at the screen while the vehicle is in motion if you are driving!!! Other than that, it will get you where you want to go if your right seat passenger doesn't mind operating the laptop, on their lap while driving...
Summary: I am returning this product, because maps must be at least 4 years old. An update to current maps released may 2007, must be purchase at the company web site where GARMIN demanded an additional $75 dollars. What a terrible way to do business. I would not touch any other model and am currently shopping for a TOM TOM.
Summary: Garmin GPS 18 Deluxe USB GPS Sensor with nRoute and City Select Navigation Software This is by far the best GPS that I've used on a road trip. I've had portable systems in the past (eMap, marine charting systems) and previously the Delorme Earthmate. This is by far the best. With the waterproof antenna I can mount the magnetic base on my roof and run the cable through the weatherstripping on my door. Then weather isn't an issue and I get the best reception possible.