It's an experience of a lifetime. The only part that sucks is how long it takes to get to the southernmost tip of Argentina (or Chile, depending on the company).

Everything is amazing. The food is ridiculously good, the ships are beautiful and you get to see the most insane place on the planet. I will likely do a follow-up post about it sometime, as the entire trip was about two weeks. While in Ushuaia we also took a couple helicopters into the mountains for some sightseeing and aerial photography. Just an amazing part of the world overall.