I stayed in Kozna during May 2007. It is managed by Pasquale, the wonderful gentleman who also manages the very popular Arcadia Residence.
Upon searching for accommodations in Prague, I initially inquired about Arcadia (due to its popularity on TripAdvisor). However, I received an email from Pasquale himself indicating that Arcadia was booked and he suggested Kozna, which I accepted.
The apartment itself was simply wonderful; very clean, spacious, well-furnished and welcoming. Little "extras" like a large bottle of water in the fridge, a hair dryer and bars of soap were pleasant surprises.
However, the most attractive feature of Kozna is probably the location!!! It is literally steps from the Old Town Square...no need to catch the subway late at night! And as others have commented, the apartment is very quiet despite its central location. Pasquale also arranged for us to have breakfast at the cafe across the street which was both convenient and tasty; the perfect start to a day spent wandering Prague!
With its comfortable amenities and unbeatable location, Kozna Apartments was the perfect place for our stay. In addition, Pasquale himself was simply a pleasure to deal with; he responded very promptly to my many emails and was very personable, accommodating and helpful upon our arrival. It truly seems that he will do all he can to ensure his guests have the best possible stay. On top of it all, he has also insisted upon mailing us a pair of pants that we mistakenly left behind! Thanks Pasquale...you're the best!
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC.