GARMIN 010-00321-00 GPS 18 Deluxe USB Sensor for Laptops Review from Fred Flintstone Fred. NMEA compliant, All of the previous reviews are pretty much on the money. The unit works great, very accurate. I do wish it was easier to change the routing the way Delorme uses VIAs, maybe there is a way i haven’t found yet.
My main addition to info for everybody is that using a little $10 program called GPS Gate will turn the Garmin 18 USB from a proprietary Garmin format to a NMEA compliant device. I had a copy of MS Streets & Trips and it worked fine. Just do a google search for gpsgate and you can try it for 2 weeks before you buy. That removes the only downside I thought this product had, now it can work with any application looking for a NMEA compliant GPS.