After 14 cruises mostly with RCCL, Princess and Celebrity, my wife and I sailed from Venice to Rome on the Jade. As a long time Cruise Critic reader, many of the reviews and comments about NCL kept me from choosing them in the past.
For this cruise the itinerary and price was too good to pass up and with only one sea day our on board activities would be limited anyway.
Too be honest I found little if any overall difference between NCL and Princess or RCCL and they are close enough to Celebrity so we would not hesitate to sail with them again.