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It's a fair question.
Websites and other direct information sources are very general in terms of the information they offe on job coditions and culture. They're unlikely to offer any real insight.
In relation to location, I know that IFSRA have acquired the old Eircell building on Dame Street (just a few doors up from the Cental Bank itself). It has always been the intention to keep the extended operation close to base.
As for real office hours, not too sure. However, for IFSRA, read the old Central Bank (despite any pleadings to the contrary). I think it's safe to assume that the culture of the old CBI will envelop the "new" organisation so any historical information you can get on the working conditions of the CBI is probably still relevant.