We have cruised twice previously with Silversea on their expedition cruises (Galapagos and Bering Strait) and when a couple we met last year on the Bering Strait cruise asked us to join them on this one we did so without hesitation.
What we were expecting and what we got were two entirely different things.
First of all on the two previous Silversea expeditions you would pick your next day activities after a late afternoon / early evening briefing. You could always get the activity you wanted. On this trip we found out too late that we were supposed to go online and pick our activities far in advance. By the time we found this out all the interesting excursions were completely sold out and the ones that were left turned out to not that good. Like a walk around a small town with a guide who just started guiding that day. Or a bus ride around a small island with a guide who had nothing interesting to tell us.
The ship is fine, reasonable food - not great but good, the staff is friendly and helpful. The entertainment could be better but was okay - we didn't come for the music. The pool area is really good for a ship this size and the jogging track makes it easy to burn off the extra calories.
The butler and room attendant were friendly and efficient. We never had to ask for anything.
The shore excursions (when we actually got to shore) were, in my opinion, sub par.
The expedition staff was mostly invisible as we never did any real expeditions. I don't know what they were along for.
The main problem, IMO, is that there are just too many people on this ship for it to function as an "expedition" ship.
I would not do this cruise again. I would cruise on the Silver Cloud if it was just a traditional cruise.
Cabin 633 is exceptional. During a recent renovation two cabins were made into one cabin so it is very large and has two bathrooms. The large screen TV is nice but reception is poor. Really no complaints about the cabin.