John and Judy,
You are in for a terrific time. My husband's boss and his wife did your exact itinerary a few months ago. They RAVED about the trip. Loved Oceania so much they are now looking to book their second trip.
He's the owner of the Company and getting him away from the office is a monumental effort. For his wife to get him to agree to a SECOND long cruise in a year is almost unheard of and gives you a really good feel for how much he enjoyed their last trip. :)
They had no negative comments at all. They enjoyed the decor, the room (they splurged on a suite and had the butler service, etc.) They especially enjoyed the cuisine - felt they didn't have a bad meal the entire trip.
Enjoy every moment!
Oh, and when you are in Istanbul, if you stay an extra night: Be sure to try the restaurant Suzanne recommended to us, Hamdi. It was really a highlight of the trip.
Kathy