I can only recommend Kathryn’s house for your stay in Galway.
It is located just a short walk from the beautiful seaside and the way to the city center isn’t overly far as well (though there is a good bus connection as well). Kathryn is a great host, really friendly and she has helped me so much with finding things in the city and additionally has a great knowledge of not only Galway but the whole of Ireland, that she willingly shares. The house is super clean and beautifully decorated. The breakfast is grand as well.
If you want to visit Galway (which I’d also highly recommend), you really can’t go wrong with staying at Kathryn’s!