Positives: Generally the location and unit are both good. It is easy to get around, there's lots to do within walking distance. The neighborhood nearby is good. The house was generally clean, and well-cared for. The appliances worked. Dublin is a beautiful city.
Negatives: We had some problems during check-in that were compounded by poor communication (e.g. the alarm went off when we arrived, we couldn't figure out how to lock the door, and we couldn't find the extra toilet paper). All of these issues are relatively straightforward to address with either a person on site during check-in, detailed instructions, or highly-responsive communications, but none of those happened. As a result our first day was much more stressful than it needed to be.