This was our third cruise (the two prior were on RCCL's Explorer and Voyager), our first (and probably last) with NCL. Overall, we had an enjoyable vacation, but there were a significant number of things that were displeasing about our experience on the Dawn.
I'll provide the 'laundry list':
The itinerary itself - NCL left a somewhat garbled and cut-off message on our answering machine less than 48 hours prior to embarkation that the itinerary had to be changed due to 'engine repair'. Instead of going to St. Thomas on our first port day and Grenada on our last port day, we went to San Juan on our first port day and St. Thomas on our last day. Grenada was scrapped. This would have been OK, except that we were in San Juan for a meager 4 ½ hours - not long enough to do anything! Also, we received two free St. Thomas excursion tickets from our travel agent, for which we could not change the dates, forcing us to purchase NCL-sponsored excursion tickets.