[QUOTE=Racing Dan;22600399]You may not neeed navigation to ride your bike, but it does open up a lot of possibilities exploring unfamiliar roads, routes and areas. I would highly recommend it.
/QUOTE]

Need is the correct word to use. I have used the course creator in RWGPS to send routes to my devices so as to navigate on road networks that I am otherwise unfamiliar with. I possibly could do this with a paper map, though it's difficult to estimate distance on paper, much easier on a computer programs. As well the GPS is keeping track of my position which no paper map can do, so I not only get an accurate position it tells me when to turn. So the answer is Yes, I "need" this device in order to follow routes in area's where I would otherwise get completely lost.