This one was the nicest Airline so far
I've tried Air Canada, Air France, KLM, Air Transat, Delta Airlines, Sunwing, EasyJet, Ryanair, and Lufthansa was by far the best.
The staff was very professionnal, polite and offered always a nice and warm service. They were speaking English very well and were efficient.
We had a sheet + little pillow on our seat, and everything looked clean
The plane was clean, cleanest toilets ever seen so far in my life, the seats were comfrortable and could lean a lot, the screen were large, and they were a lot of movies, series, podcast, musics and playlist as well as games and the 3 live webcams installed on the plane gave us a amazing live view of where the plane was actually going.
I've done Berlin - Munich and Munich - Montreal flight and they both were great
For the short flight (2h), I had a snack + beverage (which was the first time I was serve food for a short flight)
For the long flight I had a beverage + meal (meal, bread, brie cheese, salad, kind of cheese cake) + a cheese sandwich (last hour of the flight)