Having read fellow travellers reviews, I wanted to provide our opinion following our South America trip recently.
The Zaandam ship is on the small side by today’s standards (1400 passengers) but that does mean you do get to know the staff and fellow cruisers. The ship was well maintained, clean and comfortable. We opted for an outside cabin, mid ships, on the main deck due to the sailing around Cape Horn. We had good weather on the day itself but were glad of our cabin position as the sea still had considerable sized waves and motion. Even with good weather there was still quite a lot of movement so I would recommend thinking about your cabin position for this route. The cabin was comfortable with plenty of storage space even for 16 nights. The bathroom in our cabin had been updated and include a walk in shower which is much better than the small baths that used to be in the bathrooms.