Ryanair

It's the only airline I refuse to patronize after three miserable experiences. Don't get suckered in by Ryan Air's base price. When you add-up all their extra fee$ and the potential expense of transport to and from their out of the way airports, using the flag carriers is more or less the same price unless you book way in advance. Plus you get the additional benefit of not being sticklers about boarding times, slightly overweight luggage, free food/beverages, more leg room, and being able to get your boarding pass at the airport without penalty.

http://www.ellecroft.com/blog/2015/02/23-reasons-why-ryanair-sucks/

This is a very short flight...I would not worry about it.

We didn't have any problems flying with RyanAir, Krakow to Rome CIA. It was the only non stop available and it worked well for us. We paid a little extra to board early, choose seats. The only thing we didn't like was that the seats are like a molded plastic and the backs don't move at all. Rigid.
They sent lots of explanatory emails prior to the flight.

We fly them. We pay for seats in advance and make sure our luggage fits their guidelines for carryon. Follow their rules about printing boarding passes and luggage. They're fine for the short hops we do with them.

Thank you for all your comments.