I'll start with what I liked:
the hotel was located at istiklal street. Not nearby but literally AT Istiklal. You could just get out of the hotel and you would be walking on Istiklal in a matter of seconds.
The check in was pretty easy. There was a door code and our room key was already placed in a designated box. Also, the hotel had great wifi and you could also pull the wifi from the door.
There was an elevator but on the first floor.
Although we weren't in touch with Ibrahim, Banu, his friend and associate was in contact via Text.
Now the things I didn't like:
Our room had no heating, even though there was an air-conditioning unit that also heated, the remote didn't work and nothing was done to fix the issue. We spent our nights without heating during our stay.
the hotel is also very hard to find unless you speak Turkish and there is no staff to guide you in person and you are only ever in contact with the hotel via text.
Our floor didn't have any lighting either.