The best thing is the position: 3 minutes to Taksim Square.
The staff is kind, the room is small but it has all you need. Cleaning is quite good.
My room was at the first floor and the weak point was the noise: both from the streets and the other rooms, but it depends on the other guests that were really rude.
Good breakfast, considering it is a residence and not an hotel.
I will probably choose it again for a short stay in Istanbul.