Tony's place is perfectly placed - right in the centre of Kilkenny. It was a comfortable flat for a couple of days in the city. Tony was friendly and communicated well - he gave clear instructions and was quick to respond.
Maybe one drawback would be that I don't think there was much space / equipment in the kitchen, if you are looking to make your own food. But that wasn't a worry for us.
Also - there isn't any parking, so if you have a car you'll need to spend a little extra on that. We parked in Quay St and I think it was about 20 Euros per 24 hours.