Overall we had a great stay, the apartment is in a central location and is very warm. However we had a few issues. Firstly although communication was fast, it was often inaccurate/confusing. We were given the wrong address, we were not informed that the hosts were on holiday, not told when/if they were returning, and told we could use rooms (the bathroom), only later to be told by the hosts we were not allowed.
When the hosts returned, we found them abrupt and unwelcoming.
Because the building is old, you can also hear everything inside and outside the flat.
For these reasons we would not stay there again.