Christian was very responsive to my emails and provided me thorough answers to the questions I asked (i.e. suggested tours, restaurants, whether we could take our teenager into a pub, how to get to the apartment from the airport). We appreciated that so much!
The apartment was extremely clean and, although not super close to city center (it took us about 25-30 min to get to Temple Bar area, walking), we were able to get everywhere we wanted easily by walking, bus, or even a taxi.
The beds (one double and one pull-out sofa) were comfortable, and the linens provided were just fine. The apartment was roomier than I thought it would be, so that was nice. We were very comfortable.
There was cereal and makings for coffee and tea. We went to the grocery right next door for some milk, eggs, bread, and a few other snacks so we didn't have to eat out all the time. The grocery next door (Mace) had all of the basics. There is an iron/ironing board, hairdryer, and there were even a couple of shower gels available to us.
When the description says you are close to the Guinness Storehouse, it is absolutely true. The walk is about 5 minutes. And we had a great time visiting Guinness!
We didn't meet Christian in person and didn't have need to bother him while we were in Dublin, but I felt certain that if we had needed something, he would have made himself available.
We'd definitely stay there again and recommend to others. Thanks!