I have used Mapsource Topo since I started geocaching, first with my Garmin eTrex Vista and now with my Garmin eTrex Vista C. I wouldn't geocache without the maps loaded into my unit! I keep the northern 2/3rds of Arkansas loaded most of the time, when I'm home and not traveling. But if I take a trip somewhere, I will load all the maps for my route and the areas I will be visiting. The maps are even pretty good for cities and towns, unless there has been some recent development. I have been considering getting the Mapsource software for cities and towns, but the only advantage I see is that it will allow me to use the auto-routing feature of my unit, which doesn't work with the topo software. -- ORR
"Wildness is a necessity." -- John Muir
"When you go to hide a geocache, think of the reason you are bringing people to that spot. If the only reason is for the geocache, then find a better spot." – briansnat