I would not recommend staying at Felix's place. The bathroom and bedroom smelled of cigarette smoke, I was left freezing cold on the first night due to a heating issue, with which Felix was unresponsive, same thing with the hot water. The front face of the dishwasher falls off and Felix was unable to fix this. The single-pane windows also make it quite cold and noisy in the apartment.
Add to this the fact that the host, Felix is unresponsive and unreasonable in dealing with requests (for example, I made a mistake in my booking and attempted to correct it only days later -- still months away from my check-in -- and Felix would not let me adjust it whatsoever). I suspect that Felix will attempt to respond to this and deny, as he denied his ability to do anything all throughout the process, stating that it was "out of his control".