While I have sailed on several Celebrity and several Oceania ships, hands down I prefer Oceania. The ships are significantly smaller - 680 guests. There are two speciality restaurants that offer excellent food, excellent service, all at no extra charge. Dining is open seating and the ship is casual all the time, therefore much easier to pack as you don't have to take formal clothes. I agree with Kathy that the only thing Celebrity has better is entertainment.
