As a background, this is my ninth cruise overall, and my sixth with NCL.
First the good bits:
As expected, the big ship provides much better entertainment. Feature shows by the Blue-man group, Legends, and the hypnotist were much higher quality than the smaller ships. As well, there were other evening options, including an excellent (and under-utilized) blues venue, an excellent (and well-utilized) duelling piano trio, and skippable improv comedy shows. There is also a cirque show/dinner which i skipped due to previous reviews.