Соответствие цены и качества полета. Нормальное обслуживание на борту. Есть напитки холодные(вода, соки) и горячие(чай, кофе). Можно подкрепиться во время перелета бесплатной шоколадкой или хрустиками.
I've been flying with Fly Niki for two years and I am quite satisfied with their services in general. Except for a short delay due to poor weather conditions I haven't experienced any troubles during my trips. The crew is professional and they provide good comfort to the passengers (the even offer free magazines and newspapers but only in German language). Even if there are cheaper low cost airlines, I think that Fly Niki is a trustworthy company and their services are a good value for money.
Weigh your luggage at home: Avoid excess baggage charges by weighing your luggage at home and trying to stay under the weight limit (15 or 25 kilos per checked-in bag, depending on the airline). If you exceed the weight limit, you may be asked to pay 10-15E per extra kilo. If your luggage is overweight and you can't leave anything else at home, it may be a good idea for you to take a hand baggage. But be careful: you need to check the weight limits for your hand luggage too!