Don't know anything about the vocal lessons but I know a child who goes there for violin & piano, the teachers are very good and there is a really nice atmosphere. Hope that helps.
No I havent as I dont know where else to look , I am based on the northside of dublin and want it to be somewhere that is easily reached . Thy are expensive enough alright as they are over €500 for 22wks at 1 half hour lesson per week
I would imagine that anyone singing teacher that Waltons employ would have the required qualifications.
If you are close to the Dart ,you could try The Royal Irish Academy of Music , Westland Row where the Dart makes a stop. The Academy is only a few hundred yards from the station.