My brother and I were in Blacks, just out of interest I asked to look at a SAT MAP. I have the Garmin GPS60CS with Great Britain Topo software for use in hand up the mountains. Anyway, I was quite impressed with the SATMAP and the OS software. Although it did seem very expensive as you buy the unit then purchase the maps separately. It was then my brother pulled his Iphone out and showed it to the Blacks salesman. It was exactly the same. OS mapping with all the functions. Routing, zooming and tracks etc. The salesman was shocked and speechless. We both were surprised he was unaware of the OS mapping on the Iphone.
The real clincher was.... It is FREE on the Iphone