I got a surprise birthday gift today in the mail. It is a Cobra Nav One 2100 and was wondering if any one is familiar with them. It is pretty portable but seems to work at least when I put in my home location it was correct. I've never used one in a car before, so know very little about them. I'm familiar with the old Sat Nav systems on boats for example that I had on a sail boat I owned during the 80's.