Paul K.
Yelp
I was a big fan of this place- the grounds are magical, with a splendid setting right on the Atlantic ocean on 500 acres. They have 3 pools, a nice spa with free steam rooms and gym, ocean access (though bring a wet suit!), and two restaurants.
I thought service was excellent, and the food in the restaurants was very good. They have a family room (king plus two twins) which was very reasonable and a great option for families. There's lots to do- a game room, tennis courts, walking trails, murder mystery, etc. We really enjoyed our stay, and it was the kid's favorite place in Ireland.
Be aware though that the resort is historic, which some would perceive as dated. It's also off the beaten path, with most other dining options some drive away so plan on eating at the hotel a lot. My only other gripe would be that you have to make reservations for the pool, which is kind of a hassle.