Hi RiN,
In all fairness, prices are quite debatable. Rental costs are very expensive and medical costs can also be very expensive but for the rest, in the vast picture that would highly depend of your job and incomes. If you work in Childcare or sectors that do not pay much like this one, yes you will be struggling because those jobs in those sectors do not pay off a lot at all. Talking about jobs that pay you off most of the time way under the 1st tax layer (33.8k).
If you work into IT, Sale, Medical/Lab, Engineering, Management even school (high-school/university teachers), Energy, you can get paid very nicely depending your experience and skills set.
Pro:
- People are easy going, friendly mentality and mindset. You can chat with pretty much everyone (good level of English would obviously help).
- Tons of jobs.
- Dublin is wide. You have the city side, the country side and even the further beach side 
- Lots of places to visit and to go.
- Criminality has nothing to be compared of the UK, France, Germany, whatsoever. Most crimes happens if you're into wrong stuff. If you're not involved in anything dodgy, you're fine.
- Food wise, you can find good deals in lots of place. It is not that expensive if you know where to look at. Quality has a price indeed but there are some deals from time to time for them as well.
Cons:
- Rental costs are getting very expensive so everybody tend to do sharing and even local stick to their family place well over their 30's until they manage to save enough money to buy as it's still cheaper to buy than renting at this stage as long as you managed to save for enough deposit and initial first big cost (furniture, solicitors, insurance). Your monthly payments through mortgage can be a lot cheaper than rental costs and well at the end the property is yours if you end up paying up without any issues when rental cost go to waste unless you intend to stay for short term, otherwise no point renting).
- Transports (but that really depends where you plan to settle). Some areas are better served than others.
- Search in the forum for topics for the not recommended areas to live in Dublin. That may be helpful to give you an idea (i.e: Avoid too noisy/rough areas to avoid sleepless nights). That will usually be where you find the most of vacant accommodation because they're very cheap but there is always a reason why (a little bit dodgy or too noisy neighbor or sometimes simply extremely far and isolated despite being very safe and sound).
Kind regards,
Portgas D. Ace
(R.)