We selected the Rotterdam due to the type of cruise - a European tour that traveled into the Black Sea. A smaller ship was needed to navigate some of the passages.
Pros:
* The itinerary - the ports of call were top notch and the excursions available were fantastic
* The staff was very friendly and delivered excellent service
* The on-board entertainment was nice
Cons:
* The average age for the passengers was 60+ (we are in our 30's) so that's just something to keep in mind if you are a younger traveler
* It was a national holiday in one of the countries that day that we visited, so most of the shops and attractions were closed - it would have been nice if the cruise line had notified us of this in advance. Lesson learned for us is to check the holiday schedules of other counties prior to booking travel.
Over-all, it was a wonderful trip and I would recommend the trip and the ship to future passengers.