Niki is quite good (currently). Used them a couple of times out of DME.
Seating is not that bad (though no Biz Class) for a 2h trip.
And that 12 Euro food is really good. Sandwiches I don’t know, never tried them (they look like the stuff I get my cleaning lady).

But the best is that Niki/Air Berlin broke up these outrages prices out of MOW (before I could fly cross the North Atlantic cheaper than from MOW to EU-Land!).