I found this bar / restaurant by accident, it is located in a side street not far from batthyány tér metro station. I walked past it, but turned back because I was attracted by the Guinness sign.
I didn't eat a meal here, and to me this place was more a bar than a restaurant. The bar itself is very welcoming, as are the staff, and the air conditioning was very welcome when the outdoor temperature was nearing forty degrees.
The staff were were friendly, and provided good service, with very good English.
The Guinness was excellent, as was the Jamesons. There is a good selection of other very good beers also available