This was our third Oceania cruise with trying a more mass market cruise line in between. The difference was startling, and we will stay with Oceania from now on.
Our cruise was both stimulating and relaxing. We visited several interesting ports of call, but when on the ship, it was easy to relax and regroup for the next excursion.
Throughout the ship we saw happy and at ease faces including both the passengers and staff. Always a friendly "hi" and how are you doing from the staff. Maybe they are good actors, but the staff seemed genuinely glad to be there taking care of us.
We booked a semi-private tour. It was excellent, so well organized that we saw all the highlights in 2 days and even saw the subway (try not to miss this)
We used a published self guided tour. The city is quaint and beautiful and easy to get around