The grounds around the area also provide a lovely location for a scenic walk... and all within a short distance of Castlebar [less than a ten minute drive] (continually improving as a shopping town/concert venue/etc).
Havn't seen/visited the new complex but knowing some of the staff in the "old" hotel I'm assured it is a beautiful complex. Also heard some very good reports on the Spa (from someone who was working there it must be said, but with no vested interest in reporting it other than honestly).
[again, no connection with the hotel]