This was our 20th cruise. Our most recent trips were on Celebrity, Royal Caribbean and Princess, so I've provided comparisons where I think they are appropriate.
Embarkation was very smooth. There was a shorter line for those who pre-filled the immigration forms on line and brought a printout than for those who did not. We missed the champagne welcome from Celebrity and escort to our cabin, although we had no trouble finding the cabin on our own.
Cabin -- The new beds on the Westerdam are great -- as good as Concierge Class on Celebrity. Lots of closet space, lots of hangars. Verandas are average size; we were with a group that had five cabins in a row and were especially pleased that part of the veranda dividers would open so we could freely move back and forth. We had bon voyage and farewell parties out there, and many nights "met" for a pre-dinner glass of wine.