I traveled with my bestfriend, two girls alone, but we felt really safe and comfortable. Sara was very nice and welcoming with us, we chatted and had dinner together the first night and she gave us really useful information and was open to help. The room is exactly as in the pictures, really clean and comfy and the sofa worked awesome for us to chat a but and relax. Really close to a bike rental station, literally 3 min walking, and a minimarket around the corner that is open until very late. The metro station is 3 min walking also. Sara's cat, Mushy was nice and sociable with us. There are very few rules to be respected in the apartment, really easy to do.
I would recommend staying with Sara to anyone :)