My parents flew with this airline, and they actually didn't mind the lack of "luxuries". Actually, my dad claims to have been able to lie across 3 seats and sleep the entire flight! No one bothered him to ask which meal he needed, since none were provided. This was Copenhagen-Boston, round trip. Besides some minor delays, there was nothing at all wrong with flying with them. Remember, if you cut costs, you can't expect things to run 100% perfectly. Hopefully there is no hit upon safety, I think federal regulations prevent that.
Estimate your luggage well: As cheap airlines are trying to minimize their costs they usually have a restrictive luggage policy. - You can board the plane with only one piece of hand luggage (usually not heavier than 10kg and with maximum dimensions of 55x40x20cm). For detailed information on hand luggage allowance check the website of the carrier. - If you plan to also take hold baggage with you, you will need to pay for it online (when you book your ticket) or at the airport. Keep in mind that it is cheaper to pay for your checked-in luggage online than at the airport.