Guillaume is a lovely host. Friendly, helpful and generous. His place is just two blocks away from 3 metro lines (Strasbourg Saint-Denis), many bakeries (Boulangerie AYEB Patisserie), restaurants (l'Amour Vache) and cafes (Le Mauri7).
As two young women we did feel uncomfortable exiting the Chateau d'Eau after dark one night. But after that always walked North from Boulevard de Bonne Nouvelle and felt safe and comfortable on the more commercial road.