Stayed here for a match in the Aviva a while back with a few mates and it did the trick nicely as it's a 10 minute walk from the stadium. It is very easy to find.
This is an old building and the rooms were pretty dated. The staff are friendly and there's a decent breakfast.
The bar called The Den is a good starting spot on match day with a BBQ outside and a bit of life after the game too. They are well used to match goers.
Inexpensive for this Dublin post code. Would stay again.