We just came back from the Galapagos Islands on Silver Galapagos and had a great time!
The ship was perfect for this expedition though some suites did experience AC problems. The staff was very attentive. We were travelling with someone who is totally Gluten free and they made sure she was accommodated with quality meals.
If you are going on this cruise looking for the amenities of a Silver Sea ocean vessel you very well could be disappointed. This ship is small and has no casino, shop or large scale entertainment. It is dedicated to seeing and being educated on what the islands have to offer.