Joe2Kool,
Here is a link where we reviewed our top 5 Garmin GPS units. http://www.huntinggpsmaps.com/blog/best-top-5-gps-units-2015
Our chip is simply plug and play, just plug it in the back of your Garmin and go. We have 1:24K topo, trails, roads, landowner data, campgrounds, and much more...