We had such a nice stay in Killarney at John's place. In fact, it exceeded our expectations. The apartment was right in the heart of downtown as described- central to all restaurants, bars, shopping, etc. It was also right next to the national park, which was great for us. Although it was a bit noisy at night, we were given a fair warning of this and the hosts did leave earplugs!
The apartment itself was very cozy. It was clean, spacious, and had plenty of natural light. It had all amenities we needed plus more. The hosts pay attention to detail and have all sorts of nice touches around (coffee, cards, guide books, toiletries, recommendations, etc.).
John and Melanie were great hosts. They were easy to get in touch with and quick to respond to all messages.
I highly recommend staying here, I wish we could have stayed longer!