Have traveled on large ships and small and prefer now smaller expedition ships with lectures instead of entertainment.
We had 42 passengers who were all well traveled and well educated. Average age was probably over 50. It was like going to camp but with gourmet food and drinks. Everything was very casual. The best part of the trip was the wonderful interaction among the guests and with the crew.
Grey whale watching in Magdalena Bay was a highlight. We also saw blue whales, seals (you could snorkel among them), mobula rays, dolphins, and a myriad of birds. Depending on the weather each day offered snorkeling, kayaking, hiking, etc. The activities were guided and separated by difficulty levels.
Cabin was tiny but once everything was put away it was fine. No locks or keys or safe which took getting used to but then was fine. Twin beds on either side of door which opened directly on to the promenade deck which was great for being outside quickly. Not especially clean but OK.