We decided to take this cruise specifically for the itinerary. It started on London went to Norwegian Fjords and Ireland (as well as other but wanted to see these ports.
We have cruised 9 times on the "usual suspects" of cruise lines before this. People would always ask "so how was the food". For us, cruise food has always been mediocre - not many ways you can do a buffet. Oceania has set the bar when it comes to food. A+++. Where else can you get grilled lobster tails and huge shrimp at the casual grill every night. Service was also top notch.
They failed us the same places so many have noted. Excursions. A total rip off for what you get and so far out of line when it comes to pricing. Entertainment - there really isn't any at night. One fellow guess who has sailed with Oceania in the past pointed out that the majority of entertainers and signers, etc are actually cruise ship workers. The person serving you breakfast in the morning will be the one signing and dancing for you tonight. And they are just plain bad.
It is also clear that Oceania has made this a conscious choice.
I did not a fellow cruiser on this trip that did not complain about the exact same things. Most all of them have also told them this on their feedback forms and yet they still do nothing about it. It is clear they made the trade off for excelling on the food and service areas and not wanting to be better in these other areas.
Bottom line: If you want to go on a cruise where the food is world class and go to be after dinner ever evening then this cruise is probably for you. However, if you are interested in any form of night life or entertainment, then even the great food will not make up for this huge weak spot.