It's about as "Irish" as New Delhi.
The beer is standard fare. The food is mostly Indian, with very little Irish content at all; calling something a "Dublin club" or a "Belfast burger" does not make it anything other than a club or a burger. Having said that, the portions are large. The service has been uneven on the couple of occasions I have been there.
If these places want to be "authentic", the first thing they need to get rid of is all the giant TVs blaring constantly.