GPS Software > Magellan Navigation GPS Software > Maps > SD Memory Card

Advantages: Gets you around "obstacles" faster than the detours
Disadvantages: Needs to be updated once in a while

TomTom GO USA maps has taken me from coast to coast AND back (East to West and then back again ... NJ to San Diego) !!! I must say that this "map memory" is quite sufficient and can get you out of most "jams" paired with the TomTom GO device. There was a highway in Kansas that was totally blocked off and believe it or not these maps actually had a faster way to get around than the actual detours !!! I must admit that there were times that the maps ...
...who report the problem to TomTom (this really is quite easy to do). Driving through Canada to get from Ann Arbor Michigan to Burlington Vermont was a breeze though and a very pleasurable experience (this gives time to relax and enjoy the scenery instead of looking at maps the entire time). All in all TomTom did a very good job mapping out the states and Canada ... and to top it they are constantly updating so once purchased its free to update when ... Read review

Advantages: Comprehensive.
Disadvantages: Will not with all GPS systems.

I was in Canada when I bought my GPS, so it was a matter of necessity that I bought this, and not just for the heck of it. There is so much detail on this, it just blows me away, it has every thing from gas stations, retail stores, churches, parks, bridges, schools, libraries, roads, rivers and still more. This will work on your PC as well as your GPS (if compatible). Allowing you to track your hike on your PC before you even step foot out the ...
...idea of the area before you get there. I have also used the 'Search' function countless amounts of times, to try and find address and even to find some provincial trails. If you are in Canada or travelling to Canada, you really do need this. I have substituted my big and bulky maps and street finders of the different city's and provinces for 'Magellan MapSend Topo Canada Maps' and my laptop. ... Read review