I'd give it maybe a 3. The views were nice, the flat was fine, the shower was nice. The biggest problem was it's a bit misleading to call this an Airbnb. It's a hotel which owns apartments.
There were added complications to what is normally easy. They demanded an extra deposit even though it's Airbnb (Airbnb is supposed to adjudicate any disputes). It had an annoying "Minibar" box, which felt invasive and crummy. Most Airbnbs leave welcome gifts - not a price list.
The transport time between their hotel and the apartment building took quite some time with Galway traffic, so check-in was very inconvenient.
Very clean, however, thanks to the hardworking staff.
If you need a place to stay in Galway, you could do worse. I just hope the hotel management is able to fix these half in/half out issues with it not really being an Airbnb. I'm sure it makes it more difficult for staff.
Altogether it cherrypicked the worst parts of Airbnb and a hotel, without any added benefit