I thought about it and looked into it a little bit.
Cork and Dublin are both great cities. I'd espcially love to move to Cork. I've lived in Limerick before and I'm not in a hurry to go back.
Getting in is relatively easy, purely based on GAMSAT scores. The Cork course is quite traditional, not much integration of pre-clinical / clinical studies. If I remember rightly, of the courses in Dublin 1 is more integrated and 1 traditional.
Cost is the big issue (for me, at least). Fees are high and living expenses are not cheap (although Limerick is much cheaper than Cork or Dublin). There are various bank loans available (fees-only or fees and living expenses), but the one I looked at at least has a residency requirement that you have to have been resident in Ireland for a number of years before applying, even if you're a citizen. Also as it's a bank and not state loan, the repayments start as soon as you graduate and are not income-linked, and they're quite high. I don't think I could live with it, even if I found a loan I could get as a citizen with no recent residency.