I sailed on the Regatta a couple of years after it came into service with Oceania.
Shared a cabin with my classmate on a trip from Miami to La through the canal.
We booked a concierge cabin and it was soooo tiny, however it worked out ok. Book as high a grade as you can, as you get extra dibs for restaurants. We were not able to get a larger class of cabin or I would have.

I have to say that the food was the BEST that I had on any ship, and that includes Crystal and Regent.

This was the first time that I experienced "Open Seating" and really enjoyed it....The specialty restaurants were awesome...especially Tapas.

Thought the bar prices were high. We had our own Vodka and Martini glasses with us for drinks while we were getting ready for the evening meal.

There were NO drink packages available at this time

The entertainment was practically nil, but that was ok with me.
The Trivia was pretty good though.
The shore excursions were nothing to write home about (IMHO).
No dress code, had dinner one night with a young guy in cargo shorts, think he was from Alaska, traveling with his Dad.
Laundry: you have to buy tokens for the machines.
Had to buy ALL sodas and bottled water at that time....nickled and dimed to death.

All in all I enjoyed it but I don't think Ray would like it due to its size and the motion you get on it.
Would like to try the Marina some day since it is much larger and newer.

Hope you have a good trip,
Pat