Very good little Sat-Nav, has reliably lead me round London (oh horror) and to other places I have never been to before, it alters the route when I make mistakes and puts me back on track. It is very easy to programme. Instructions at the top visual area of the screen, are so good that one can navigate without the sound. The battery life is exceptionally good.
Great for off road adventures, in bike and walking mode, have successfully geo-cached with it.
My only criticism of this model is that the voice is a little muffled, this may be because it is waterproof.