I flew with Ryanair for the first time this week; firstly MAN-DUB then DUB-LPL. I must say, the flights were spot on time and I had no complaints at all.
Bit nonsensical really the amount of hand luggage people take onboard though. I myself checked mine into the hold but on the flight from MAN-DUB the overhead lockers were completely full; people cramming&pushing to their heart's content to get their larger than life suitcase above them.
Ryanair does what it says on the tin: cheap flights to popular places, no-frills service. Why people would complain about it when the prices are so low is beyond me.