While I will say that the Ryanair plane was very clean, despite that it is no where near the standard set by WN. Ryanair's concept of customer service is to invent more add on fees and junk fees than anyone else could conceive. Fees for OLCI, much higher fees for airport check in, fees to pay by credit card, fees to purchase the ticket in person, iirc there is a fee to buy on line, and their excess baggage fees are truly impressive. That starts at £15 if you pay online, but if you don't find out your bag is too big or overweight till you get to the airport, it starts at £35. And that only covers a 15 kg bag, after that it's £20 per kilo. (These are Euro or UK pounds, they figure a 1 to 1 exchange rate).

Oh, and £40 if you didn't do OLCI and or lost your BP and need a new one at the airport. WN doesn't hold a candle to them!