In other words Norwegian offer a strait forward honest service, and with a punctuality equal to the best of the legacy carriers and a regularity better than most of the same carriers. It is pretty certain that you arrive at your destination on time and that for a reasonable price. What more can you ask for?
Do you perchance work for them? I think Norwegian's plan to have offshore pilots for the B787 fleet is as ruthless as anything Ryanair have done. They're determined to keep costs at rock bottom.