A couple weeks ago I was asked if I would like to use the counties GPS unit to plot our clubs trails for the new county trail map. It didn't take me long to answer the ?. I am wondering if anyone has used one of these units before it is a backpack that you put on and all you have to do is ride. The only bad thing about it is that you have to ride about 10 mph in the woods and about 50 on the straight aways.