Odyssey on Zuiderdam is wonderful. Good suggestion above to read the evening's menu early in the day and then decide which night to make reservations.
I would not think you would be able to eat two entrees at Odyssey. The portions are very, very large. We could not begin to finish what we were served.
We were on the ship or two weeks and dined there three times. Every dinner i Odyssey was excellent....to our taste. Enjoy.