It was great to meet Basma. She was very welcoming and made us feel comfortable since we arrived. Basma is a very friendly person and she was always available to give us a lot of tips about where to go, what to see, where to eat in Istanbul. Her house is located in a safe area close to the main attractions, and very close to the tram station, which is just a couple of stops away from the main attractions (e.g. Sultanhamet). However, if you can also walk (as we did some times) as there are plenty of nice shops and other attractions.
Basma woke up just in time (at 5 a.m.) to get our 8 am flight. We enjoyed every moment of our stay, therefore I strongly recommend Basma's house if you want to really enjoy your stay in Istanbul.