I loved staying at Dorothée's and her partner's place. It was very homey, warm and very stylish in some retro style. I got undisturbed access to the kitchen area, private bath and toilet. The room was small but cozy. Was staying in October, so the heater was handy and could be adjusted. The apartment is located in an old house, so have to consider creaky floors, narrow staircase access to the floor. No issues with that respect for me as I was traveling light. However, if traveling with a heavy check-in luggage, can serve a major headache.
The house is super conveniently located close to the city and major tourist attractions point. Bus 38 will take you in 10-15 min from the Gare Central to the place. Then a quick and short stroll.
Check-in instructions could have been better arranged. However, giving credit to the guys, they allow flexibility around check in / out times. Otherwise, really good impressions. I'd stay another time, should there be a chance.