In fairness to Ryanair they rarely get these things wrong and couldnt see them putting in the routes if they didnt feel they would work. Ryanair havbe no issue with the €10 Dev fee at knock as its being in place for 20 years and they accept it at this stage, lets face it these types of fees are becoming more and more necessary to sustain regional airports eg Durham tees valley announced intro of one last week. Sun routes tend to yield more money for ryanair as passengers tend to pay that little extra a paris or AMS or DUS would work very well but couldnt see demand for any other city breaks as the demand just isnt there whereas they will come from all over to use the sun routes as was proven last year