I have used it and I really like it. it's not as great as the Microsoft Streets and Trips - but on a tablet or hand held device it works really well.
You can import the markers from Google Earth into Maps Me and set courses and track your route.
I really miss Streets and Trips - but we wanted a map product that would work without an internet connection and for a free one - it works great.
I use it hand in hand with Google Earth's street view to plan my course and set a marker. Then import the marker into MapsMe for when I'm on the road and without internet.
