We had a 2,5 week stay at Berna's place and we can highly recommend it to anyone who is looking for accommodation in Istanbul. The location is unbeatable: Within a few minutes you are at the Osmanbey metro station but no need to always look far away, since Bomonti itself is also a very nice area. Bomontiada, one of the cities hotspots, is within a few minutes walking distance and Tesvikiye can be reached can also be reached within 10-15 minutes.
It was a treat to have Berna as our host. She was responsive at all times, very caring and her place was very clean.
We would love to be her guests someday again and can recommend her place to anyone who is looking for a place to stay in Istanbul.