It depends especially on the level of comfort and facilities on board you are looking for:
In general, cruises include: accommodation in cabin with private facilities, guided excursions with professional Licensed bilingual guide, transfers within Galapagos (on cruise dates), Airport assistance, all meals on board while cruising, drinking water, tea, coffee.
Luxury and First class cruises also include usage of snorkeling equipment and most of them have sea-kayaks on board for guests. Some Luxury class cruises also include Wet suits and others and First class cruises have them available for rent on board.
Midrange and Economy class cruises have snorkeling equipment and Wet suits available for rent on board (in cash).
Land visits are, just as cruises, subject to National Park regulations for all departures; this means that all the day-visits are subject to a pre-determined schedule for the day’s activities and visits to one or more sites in one Island and they cannot be modified in any way.
During your free time in one of the populated Islands, you can stroll within the Town and enjoy many local attractions, good restaurants and bars, visit Darwin Research Center (Santa Cruz) or Interpretation Center (San Cristobal) and, of course, feel surrounded by many birds and playful Sea lions, especially at the Town’s Docks