My family and I stayed at Ashton's apt for four days. There were five of us and it did not feel cramped at all. The apartment is comfortable, clean, and is in a pretty cool neighborhood.

My in-laws arrived in Dublin earlier in the day than I did and checking in for them was not a problem. Ashton was abroad, so his girlfriend was playing host for us, but both of them were easily reachable and were super helpful. We did rent a car to drive to the cliff of moher and were able to use the parking garage of the apt building, but note that it does cost 15eur per day. It is much better than what you'd get anywhere else in Dublin but I did mistakenly assume it was included with the apt.

In short, great apartment and a great host!