I had breakfast here recently with friends. Although I live nearby I hadn't been before. The tearooms are nicely decorated and old fashioned in a nice way!
The breakfast was delicious and not too expencive at just over €11 for a full Irish, pot of tea amd a latte.
The only negative point was that it was quite cold inside, my friends kept jackets on. We were there though at 10am just as the place opened so I presume it would warm up after awhile.