I have used them many times.I have a friend on a 2300 mile motor cycle trip with one right now.If anyone would like to see the trac and how it works send me a email at big5vp@aol.com and I will forward the link.Tom
I got mine when they first came out. Its a really nice thing to have on the boat. And it works as advertised. I have found some rather unconventional uses, such as plotting one of my vacation cruises, marking a place that I wanted to be able to come back to, and sharing my location with friends. I almost always have it with me, never know when you might need that 911 button on it.
lets my wife know where we are and when you are way out of phone communication it lets them have peace of mind... now how priceless is that when you come home and they have not been worried sick about you being a little overdue???...!!!