I stayed at Marie's flat for a month - it's a lovely place, bright and spacious, with well-equipped kitchen (if you need to cook) and warm, cozy bedroom. Even though the flat is on the ground floor, it's really safe and secure - important for any solo travellers out there! The location is incredible, really central and you can easily walk to all the main sights and attractions as well as bakeries, cafes, bars and supermarkets.
Please be aware that the flat doesn't have an unlimited broadband connection, only 5GB per month - unfortunately the host didn't tell me until I arrived and that caused a lot of problems for me, especially as I was staying for a month (my allowance was 20GB but I still had to drastically reduce my usage). The flat listing has now been updated to state this piece of information.
Apart from this issue my stay and communication with Marie was great, she was very helpful and responsive.