We've stayed with a colleague in Oya's apartment for 4 nights.
The apartment is in a quiet and very convenient location, walking distance to metro station and also the supermarket is very close. There is a park almost next door if you want to do some jogging or just go for a walk.
The apartment itself is nice, with 2 separate bedrooms and a living room plus a small, but fully equipped kitchen. It would, however, need a new paint, as the walls are quite dirty (at least in the smaller bedroom). It is on the ground floor, but with windows quite high above the ground, so apart from a cat starring to us one evening through the window in the kitchen while we were having dinner, we haven't felt unsafe. The worse thing was that heavy cigarettes smell in the living room that we were not able to get rid off even though we tried with windows wide opened, so we could not use the living room at all during our stay and, one more thing, even though the internet/wifi is stated as available in the apartment, do not trust the website. There is no internet connection in the apartment, so if you want to stay connected, you better look for something else.
Having said all this I have to mention Oya and her daughter were very responsive and quite willing to solve our problems. They have even asked the hairdresser from the neighbourhood to let us use his internet connection and provided us with password, however, it did not work from the apartment.
So, basically, if you are a smoker and do not mind no internet connection, I would recommend this apartment. Currently I think it's over-priced for the location and the status of the apartment.