Wizz Air

I must say that my flights was rescheduled (from 15:50 to 5:40AM!!); then your options are to cancel it and get back your money (only this leg) or change it for free to a similar flight from Wizz Air (same trip, day before at 6:00AM).
When checking-in is mandatory to do it online if you don't want to pay an extra fee (even though you're checking a bagage).
The line to check-in the luggage was chaotic and very slow, also the staff was so unkind.
The boarding was quite quickly and easy.
Even though was a flight with an unbelievable schedule, the crew didn't let us sleep because they were selling products all the time.
Also, after 1 hour in the air and beeing sleeping, one of the flight attendants woke me up to check if I was seated in my seat... I still ask myself if it was really needed to do it, after 1 hour flying and beeing asleep. I couldn't sleep more since that moment.
I could also see how a sick passenger had to lay on the floor as the flight attendants didn't want to give her a more comfortable seat. After a long time they agreed (I don't know if she had to pay the extra fee to seat at the XL seat feeling sick), even though most of the XL seats were empty.