It depends. It would not be too much for a semi-d in South County Dublin for example. But it would be over the odds for a small town in the Midlands I would guess.
Depends on where you are. I know someone renting in Portobello with monthly rent of E525 for a one bed flat. Similarly another person I know is paying E765 for nicer version of same flat. There's value out there but alot of demand....
OP, depends on where you are renting really. If its in north Cavan, you're probably overpaying. If its in Ballsbridge, probably not.....