If you have a GPS and want to download/upload tracks, view them overlaid on 1:50,000 a genuine OS seamless map then this is really good. Whatever 1:50,000 region you buy you get the whole of the UK on 1:250,000. The latter is not much good for walking etc. but good for general use. The maps are just the normal OS excellent stuff. The Fugawi interface is a bit weak and not very intuitive (for goodness sake a quick GOTO feature would be useful) and this is why it only gets a 4 rather than 5. I use a Garmin GPS and it was a piece of cake to interface. You also get the GetMapping arial photos and some pretty good streetmaps too.