I cannot recommend Bob's place enough. The location is central and walkable, the house itself is very comfortable and has funky decorations, and Bob is a wonderful host. If you stay here, you'll be staying in a three-bedroom house, of which all three bedrooms are let out on Airbnb (Bob lives nearby, but not in this house). I met two other really great solo travellers while staying here. I had everything I needed, and Bob was super accommodating when it came to check-in/check-out times. If you're going to Dublin, do yourself a favour and stay here!