Overall, they're pretty good! They are an economy-type airline, though, so don't expect a huge amount of legroom or seatback TV screens. The food can also be a bit hit or miss as well, so you may want to bring a sandwich or some snacks for yourself. But their staff is very attentive, their flights usually run on schedule, and they've never lost my luggage (touch wood!). Also, their overage charges were very reasonable, I thought -- just 30 quid per suitcase --which was very handy when I was moving back to the States! I've flown them several times from Edinburgh-Dublin-Chicago and was always satisfied.
One thing I really liked about flying with them from Dublin to Chicago is that my passport got stamped at Dublin airport, which saved a lot of time upon arrival. I didn't have to wait in a huge queue, just went straight towards the baggage carousels!
