I'd be interested to hear other people's thoughts and experiences on Sat Navs designed specifically for cyclists. I currently use the Mio Cyclo and have found it invaluable. (Also can work as a car Sat Nav - to get you to the start of your route). The one I have is the Cyclo 300, which I think Mio have discontinued but can still be purchased new if you look around. Its been replaced by the Cyclo 305, which is similar to the 300 but with, I think, a slightly bigger screen. (And, no, I'm not working on commission!)