I went to Queens a few years ago, and left after my degree to study my diploma elsewhere. Although Queens is quite highly rated as a university in general the Architecture department is not (I think) really up to much. Despite pretty much enjoying myself while I was there, when I left (for the Mac, Glasgow) I realised I had missed out a lot in those three years in terms of what studying Architecture can really be like. This is just my opinion, and I'm sure someone will disagree. If your staying in Ireland try UCD (from what I hear).