We are frequent cruisers on all lines. We sailed 8/6/11 from Copenhagen and found the Norwegian Sun to be a great ship. Embarkation and debarkation were orderly.
The ship was clean, the staff was friendly and helpful, and the variety of free dining choices should meet anyone's standards--and there was food served all night in the sports bar.
With the exception of one night, the shows were really good (went to one twice), and the nightclub was FUN after the show!
We were pleased with the Baltic ports and our tours. We walked around in Warnemunde, staying near the port; took a tour in Tallinn; two-day tour of
St. Petersburg; and did the Hop on Hop off in Helsinki and Stockholm (HO-HO busses were right by the ship and you could just pay and go. We would take this ship again in a heartbeat and would recommend it to anyone!