There are superhosts, and then there is Armin-- in a class of his own above the highest echelons of hospitality. He was communicative, informative, friendly and was available when we needed him. His directions were accurate and easy to follow, and his place was a stone's throw from public transportation-- incredibly easy to get anywhere in the city within 30 minutes.
The apartment itself was immaculate. Clean, tastefully decorated, and with all the necessary amenities. He allowed us the check out a bit late (our train wasn't until the afternoon) and told us not to worry when we disturbed him by checking in quite late in the evening.
In short, best AirBnB ever. Thanks Armin!