We have been on quite a few cruises, mostly Caribbean, Bermuda, etc but never to the Europe. Have traveled with Norwegian many times, mainly due to the costs per itineraries- we find they seem to offer as good a deal as anyone else and better than most. Lots of stops on this cruise.
First the positives- Great deal, around 50 bucks per night base price. Great ports. Less structured freestyle dining equals more flexibility in most cases.
Crew was excellent for the most part ( some exceptions noted later ), Helpful and Friendly. Check in at Venice was a breeze compared to some other embarkation points we have visited.