That was a perfect apartaments choice. It is located between 2 metro stations (about 10mins walking to each of them). Location is very quiet, but there is a busy street with lots of shops, banks and streetfood nearby. The private room was very clean and spacious enough. The bathroom was also clean and comfy.
Ahmed is very friendly and welcoming host, with a possibility of late check-in. He's also very helpful: told me about the best non-touristic places to go in Istanbul, gave an Istanbul card and helped with lots of issues. And finally just a very pleasant companion to talk in the evening. I was very pleased to meet him