Omer's apartment has everything you need for a nice and comfortable stay. It's located in between Halic and Sishane Metro, in the vacinity of Galata tower. Omer was a really nice host even though we didn't met him personally but the communication was smooth, he was very responsive.
The only caution is that its located on a steep hill so be prepared for a healthy walk upside towards metro, buses and Glata tower.
We recommed the stay at Omer's apartment in Istanbul!