My wife and I typically don't leave reviews on review sites (particularly negative reviews) but we felt obligated to share with anyone considering Australis Cruises so you can best plan your trip.
WARNING! :) If you are under 35 this is not the cruise for you and the way to spend your time in Patagonia/Tierra del Fuego! Other resorts (like Remota or Explora) would be a MUCH better option.
1) Age: The average age of the cruise was 50-60+ and you only spend an hour or two off the boat per day! So for younger people seeking adventure you will go stir crazy. We don't have anything against older people (there stories are the best!) and we made some great relationships. The company tried (somewhat) to give easy, medium, and difficult hike options for the short excursions each day but even the "most difficult" hike would be 1-2 miles max and incredibly slow. A lot of the hikes were through normal looking terrain you could easily see not on a cruise. You can also see plenty of glaciers by land in Patagonia.