I've run both the free and full versions. The Free ones are great. The Full Version is Wow!.
I liked the Full Version so much that I purchased a second for my Wifes cycling gps (Garmin Edge 705).
Since a good number of the sled trails are mountain bike trails, they make getting around the woods a lot easier.
Not to mention the bargain price. For about the price of club dues, you have a map loaded with features, that you can use year around.
Again, Free is exceptional. Full version is Wow!