Mr. GrassLakeRon,
For years we have been using my Wife's Polaris 4-wheeler and our Polaris (Big Boss) 6-wheeler with tracks; our version of the Alaskan Pack Mule. Our "Mule" will go most anyplace the Argo will; with the exception of floating. As others have mentioned, the Argo is slow in comparison.
In addition, the Argo is very rough riding for anyone not in the front seats. If you have a shell covering for foul weather, it is very noisy inside. It is my understanding they have improved the axel seals on the newer models so that they not only last longer but leak less.
Having said the above, my Wife and I are looking forward to getting an Argo; perhaps as early as next year. At my age, speed of transit is not a high priority. Being able to float a pond for fishing or photography will be nice. Besides, we could more easily include the Devil Dog (her pooch by name of Shiloh) in our excursions.
Best Wishes
Sawmill Creek, Alaska