I've always flown them to Ireland. They're not a great airline by any means but they tend to keep to their schedule and their pilots are phenomenal. They know how to land in shit weather (with a good bang) and have the best terminal facilities in Ireland. The planes aren't beautiful but they are safe (knock wood), and it's a relatively short flight. These days, that makes Aer Lingus a good carrier. I'd choose them over any of the others and they're usually the cheapest carrier over there. They're also a carrier nobody wants to blow-up and I do count that as a plus.