Very Good Topo Map Data Base
I use this software on my Garmin etrex hand held GPS for hiking. No matter where I hike the map base covers fire roads, or any well established hiking trails. It shows streams as well as any other bodies of water, etc. Very pleased with map data base.

Garmmin Mapsource
Hello

I like this item but the hidden unlock code had me ready to throw it in the trash. After I found the unlock code between the shipping package card board everthing worked fine.

I was only able to down load one state (SC) into my Garmin Etrex but it works fine & I would recommend for cars, bike or hiking.

Kevin

Could be more detailed
These maps are almost essential if you have an etrek unit. The maps that come with the etrek are woefully deficient and you need to upgrade them. But even these maps could be more detailed especially for the hiker or geocacher. For topographical maps, these are not very detailed and if you want to route plan cross country you will need much more detailed maps. However depending on what maps you get, you can set waypoints on the more detailed maps and transfer them to the etrek and they will overlay the Mapsource maps.

Room for improvment
I had this software navigate me through the United States from North Dakota all the way down to to Texas and South end of florida. It did quite well however I was at times awed by how well and accurate it was. Then other times I was awed at how inaccurate it was(usually only out on the open road that it would be out by so much). Bottom line I am glad I had it along.

Better than nothing, but not by much.
Highlight: The actual Mapsource program, for transferring maps to your handheld Garmin. Lowlight: The actual TOPO map included on the DVD. For my area, it has some kind of datum error, off by almost .1 mile. Contours seem OK, placement of POI not so much. Found a much better Colorado topo map on the Web.