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While the other review notes disatisfaction with use on a PDA device, I am writing to express my pleasure using the device on my laptop. Since it uses a USB connection and communicates using a serial COM port, I tend to believe the other user may have not had something configured right - COM ports are somewhat confusing and difficult to configure, although that is a "problem" with all GPS serial devices.
Once installed and configured, this device has been incrediably accurate and trustworthy. However, it is somewhat of a mystery which COM port it will choose each time you plug it in (it seems to depend on what USB port you choose, so if you use the same one each time that's not a problem). Again, this is an issue with all serial GPS devices, not just the Holux.
I use all sorts of SiRF and MNEA software to look at the raw data sent from the device, and use it with Microsoft Streets to navigate around. I also use GPS when I go out "wardriving" to map the location of WiFi hotspots. With my laptop in hand, this device is able to "notice" when I cross the street! I've never had the device lock up or stop sending data, and it aquires sattelites and computes my location usually before I can even get the mapping application open and configured (about a minute). After that, it sends location updates about once per second, which is pleanty fast enough to keep your position accurate as long as you don't plan on going over 80 MPH.
