My sister had taken a similar repositioning cruise a year ago (Lisbon to Rio) and said it was the best (out of 50 or so cruises), the food, the service, etc. We found the food exceptional, to the point that the diet began half way through the cruise, due to our weak will power in the early half. We did cheat occasionally on the crossing portion. The added-on amenities re gratuities, land-based tours, air fare, internet etc., all made it attractive.
Loved the Barista coffee efforts and afternoon tea.
At first we thought oceania was too secular with no Christmas/holiday decorations, then one night the staff did a fabulous job, trees, lights, wreathes, and had a big reveal of a life size gingerbread house up and running. There was a limited Sunday service on one Sunday, and a Hanukah candle lighting effort. We have travelled Holland America and know they make an effort to have a priest on board for religious services.
Nice size, 282 sq ft with an double size balcony. Shower was not built for a 250 pound man. (I was 206 at the end of the cruise!). The bed size and linens were upscale in comfort. Internet reception was the best I have seen in the cabin. The maintenance staff were very quick to clear a toilet slowness, but we had to tell our cabin attendant that it was gradually slowing down. Ask and you shall receive. Balcony size was a bonus!