I believe other reviewers miss the point in comparing their experience on Silver Galapagos with other cruises. The Galapagos is a closed, tightly regulated market; only ships exclusively dedicated to the Galapagos can operate there. So the question is not how Silver Galapagos compares to Silversea or other cruises outside the Galapagos; the question is what is the best way to visit the Galapagos. Unless you want to be on a small boat with a group of 16, the answer is almost certainly Silver Galapagos.
You come to the Galapagos to see the animals, plants and landscapes of these unique islands, not to eat, drink and party on a boat. So job one for any company operating there is to get permission to sail the best possible itineraries, and then to attract and retain the best possible expedition leaders and guides. This Silverseas has done. Everything else is secondary.
Silver Galapagos carries 100 passengers, the maximum permitted. The ship is the largest and best equipped operating in the islands. The all-Ecuadorian staff (required) makes up in enthusiasm and warmth what they may lack in polish. In terms of true hospitality, they could teach a thing or two to their Silverseas colleagues operating in international waters.
The room for improvement lies not with the crew, but with Silversea. They erred in investing too heavily in cosmetic improvements, and insufficiently in the infrastructure of the vessel. In the choppy waters of the Pacific, the stabilizers were "undergoing maintenance," and apparently had been for months. The nicest suite, recently gussied up, was plagued with mechanical problems such as broken doors and non-functing electronics. If Silversea wants to continue to associate its brand with this ship, it needs to invest in the vessel, and also invest in the crew. If they want to retain the best people, Silverseas should strive to be regarded as the best employer in the Galapagos.