We stayed in the apartment for five days. It is quite small but nicely decorated and provides everything needed for a short stay. Communication with the hosts in advance and during the stay as well as check-in was supernice and swift. The location is central with a bus-stop just in front of the building. The old-town is easily accessible by foot so we needed no transport for most of our stay.
Unfortunately there was some major construction work going on during our stay that was pretty noisy in the mornings.
Overall we'd consider the apartment a good choice in the very centre of the city for a reasonable price.