Charles' place is great. We had a wonderful experience there. The flat looks just like in the pictures, with nice decoration, and a lot of light coming in throughout the day. Everything was sparkling clean when we arrived.
The building is very well located, with a metro and tram station just outside, and there are plenty of dining options and supermarkets within walking distance. Even though the train tracks are pretty close, one can barely hear a few trains humming when they pass by.
Last, but not least, Charles was very nice and helpful. He replied very quickly every time, and given that we had a late train on the last day, he let us leave our bags in the apartment until our departure time.
We had a great experience and definitely recommend this place!