I flew Norwegian Air once. That was enough.
It was only short haul (Canaries). I had a 7am flight. Despite the aircraft being attached to an air bridge I had to traipse out across the apron to steps at the rear of the aircraft (so as to facilitate speedy embarkation). It was pelting with rain and freezing cold. I spent the next four hours nicely strapped in wearing soaking wet apparel. I ordered a drink "deal" and only got half of it served before the stewardess proceeded to the next seat. When I asked for the rest she insisted I'd only paid for what I'd got (and the discussion was made more difficult by scarcely anybody among the crew being able to make themselves understood).
You gets what you pays for (or, in the case of Norwegian, don't get what you pay for as their fares were not particularly cheap). Hopefully they've shaped up a bit following their foray into long-haul, but never again for me, short or long.