This new "open" forum posting is not like it sounds. We just returned from an 18 day South America cruise from Santiago to Los Angeles on May 1. Of all our shore excursions we took, one was a problem in Puerta Vallarta. We expressed our concern at the Shore Excursion desk when we returned with no satisfaction. We did fill out a form for them to forward to their headquarters to investigate our problem. Upon returning home I went to their website and rated and explained the particular shore excursion and what the problems were. I did it in a nice way, being careful to include details, costs, etc to explain the situation for others to see. THEY DID NOT INCLUDE MY RATING and/or DESCRIPTION for others to see. It was screened and not accepted.
It appears they will only publish the positive responses. I can understand screening those comments that are derogatory or nothing but complaining, but I considered mine to be tame and factual.
Therefore, be aware that what you read from passengers on NCL's website is probably only the positive comments.