We got to stay in Martin’s apartment while he was traveling. It was really good for us: everything is exactly like in the pictures and Martin was flexible and tried his best to help with any issues, even when he was on holiday. We didn’t get to meet him but he seemed super friendly and warm. The apartment was well equipped and located in a quiet area. No noise at all at night and well connected to Zurich central by public transport. I recommend it for the next time Martin goes on holiday :)