It was a pleasure staying in K&N's apartment, which was clean, comfortable and characterful. Although we didn't interact with K&N directly, Mr T did meet with us a couple of times on their behalf.
Our hosts were very quick to respond to any concerns: for example, we found that the provided wifi hotspot had a fairly short battery life, so Mr T came by within a couple of hours to provide a replacement (along with a welcoming gift).
The local train station was only a few minutes' walk away, and we found getting to most attractions required no more than one transfer. On our last day, Mr T was kind enough to drop us directly to a larger station, with a direct line to the airport.