The room offered by Karen is very large and very bright and allows a peaceful stay even for several months (I stayed there for almost five months). The room has a very large bed, two wardrobes and a desk. On the same floor as the bedroom there is a private bathroom equipped with a sink and a shower, while the toilet is located upstairs and, despite being in a shared area, it is almost always used exclusively by the guest, which is very nice. The location of the house is quite central: the nearest metro stop can be reached in 10-15 minutes on foot, but you can also get there by bus. From the metro stop you can reach the center in a few minutes.
Karen is helpful and welcoming and her son is also very kind and always ready to lend a hand. You can easily establish a sense of family, while respecting each other's privacy. The management of common spaces and times of use (for example, the kitchen or the dining room) is very natural and non-problematic.
I can recommend this place even for long stays.