It's a great product for Tactical maps. Either for use by the DM or to print out in 1 inch squares for miniature gaming.
It is not a great product for world mapping. In fact, I would say it isn't suited for that at all. (some may disagree)
I actually love it and use it all the time, but for tactical mapping, rooms, encounter areas, etc.
Game ON!
Nyrfherdr