We went to Banna and rented two sand dune cottages for two weeks each. I can only speak for my family (the other cottage was my sister and her family - but I know she said it was spotless and pretty much a home from home - she had a problem with hot water but it was sorted the same day).
Our cottage was also spotless. Both were very quiet - no noise at night from anywhere. Lovely and peaceful - but they were on the site boundary away from the main leisure centre which some have mentioned... although I never saw anything to be concerned about there myself.
Kids loved the pool - in it every morning. The life guards were good - keeping the swimming lanes clear for swimmers. The changing rooms were very clean - no smells as some have mentioned... and we were there every morning for two weeks. They always seemed to be being cleaned, in actual fact. Also had free hairdryers in the changing rooms.
A little shop on site which didn't sell much but was okay for a paper / milk etc.
The location was brilliant for many of the tourist attractions that the southwest has to offer - too many to mention really. We did attend the Rose of Tralee festival for three of the four days it was on, which was great entertainment. Dog racing. Dolphins at Dingle. Bunratty folk park. Muckross. Conor pass. Horse riding. Ballybunion beach (a few times!). Kenedy's pet farm. The list goes on. Everywhere we went was either free or good value for money. Dawsons tea shop in Tralee was great! We went to Kate Browns in Ardfert for a meal - good food / kids meals / reasonable prices if you stick to the specails board. Very child friendly really.
The kids loved Pirate Pete's - although they do need some decent seating in there - but it was great to kill some time between visits out.
The outdoor playground is well equiped and kept even older kids entertained.
We didn't go to the arcade or see much of the night entertainment as we were usually out elsewhere.
All in all, the staff at Banna were helpful, the handman on site was great - quickly sorting out any problem with no questions asked, and our kids loved it. The weather could have been better some days but we went shopping / cinema, and the sun soon shone.
We'd go back!