We arrived at the end of August and stayed 2 nights and then for one night in September. Our first room, face the Killmainham Jail. It was a large room with a king size bed. The bathroom had both a tub and a separate shower. The location was great and the hotel was very quiet. Blink 182 was playing a concert across from the hotel. We didn't hear any of the crowd on the street from our room when the concert was done. The breakfast was amazing. Ask for a voucher at the front desk. This saves you about 6 Euro off the price.
My only issue is that when we arrived for our one night stay in September, our room was considerably different. I double checked that when we booked, our room category was the same for both August stay and September stay. It was. Our September room was 222. Don't stay in this room. The AC barely blew, we had someone come to look at it. She put her hand up to it, said it was cold and that was that. The bathroom had only a shower and was considerably smaller that our August room. Also, my side of our king size bed was horrible. It slanted inward towards my husband. The difference in height of the two mattresses was so significant, that I had to put a pillow between my husband and I so I wouldn't roll over to him all night. It wasn't a pleasant sleep at all. I'm not sure why we had such a great room the first stay and a crappy room for the second stay, especially when we had the same room category for both.