Nicolas' place is fantastic, it is spacious, clean, calm, modern, with two balconies and close to the nature. It is also very well communicated because there are two buses and two trams that connect to the city and a couple of restaurants close to the place. Besides, it is very close to the forest, if one wants to go walking/jogging in the nature. Regarding the room, it is huge and very clean. He also provided me with towels, which was really helpful to me. And the wifi is good, stable.
He was also a very kind host. For anything I needed, he would find a way to help and he even allowed me to wash my clothes during my stay, which was unexpected.
It is not exactly in the city center, but in my case the location was really convenient because I had to go for work and the building was 7min walking from his place.
To sum up, I had a very cool stay and I totally recommend staying in his place.