Top in all respects.
Location is excellent if you're doing the tourist trip of the city. A brisk 20 minute walk will get you into the city through the Meadows.
Basically the apartment has everything you need. A small but more than functional kitchen was more than sufficient for our needs, we generally only had breakfast in the flat.
The beds are very comfortable. The heating is brilliant and instantaneous.
The hosts are a lovely couple and communication is second to none, flawless.
Given the opportunity we would stay at their flat without a seconds hesitation