Hi,
Here is a report from the trenches:
I live in athlone and did the commute to Dublin (chapelizod) yesterday morning. I was testing the commute from Chapelizod to Baggot St, since I also have gotten a job on Baggot Street. I left Athlone at 5.40 AM and got to chapelizod at 8am. Traffic started way before Lucan turnoff and lasted u until the M50 roundabout. From there to chapelizod was fine. I got the bus from chapelizod to D'Olier street and walked to Baggot St from there. I arrived at workplace at 8.45AM. If you were to drive up the quays rather than getting the bus, it would take much longer due to bus lane introduction.
Thankfully this was a once off journey for me. Moving up to Dublin was the only option for me. This was no problem though, I have no ties in the midlands. It really does depend on your own circumstances. However, I would not wish that commute on anybody, plus you will hit the exact same problems on your way home. All in all it would add up to a 14 hour day I would estimate, its up to you. Hope this helps.