For intra Europe flights, I will book Easyjet, Norwegian, Wow, Wizz, or Vueling without thinking twice. I have flown several segments on Air Asia as well. They are all very upfront and honest about what you do and don't get with your ticket. The passengers who complain about unexpected airport fees did not do their homework when they bought their ticket. Ryanair and Spirit are not as clear, especially Ryanair who charges for a boarding pass. I haven't flown as many LCC flights in the U.S., but I lived in Cincinnati, which until 2014, did not really have LCC service.