Very nice host, very reactive with our questions ; also the appartement is very well located, you can do everything on foot, in a 25min perimeter maximum for the furthest museum.
However I would not recommend the appartment in itself, heating was not working, there were some plumbing issues (that our host resolved in 24h, and by chance had another appartment just next to our place so we could use the bathroom there), the window was impossible to close, some equipment was a bit tired..
I gladly recommend our very nice host, but maybe other apartments from him instead of this one. Also all the issues we had are fixable, so maybe for the next guests everything will be resolved!