We had a wonderful stay at Gonz's apartment! We arrived several hours early, but Gonz offered to look after our luggage so we could enjoy the city for a while. The location is amazing: both Lac Léman and the train station are within walking distance, and the city center is nearby as well (though the walk is entirely uphill ;-)). The supermarket is just around the corner, and there are two bus stops within 200 meters.
The apartment itself was bigger than we expected, it was clean and tidy, and the kitchen was amazing - large fridge, amazing oven and loads of space to cook.
Gonz was available for questions all week and was happy to help us with our luggage - a superhost indeed! We'd definitely recommend this apartment to anyone looking for a relaxed stay in the beautiful city of Lausanne.