We had a good time at Ezgi's apartment - our main contact was her sister Burcu, who we were in contact with via Whatsapp throughout our stay.
The decoration is the apartment is very good - warm and homey, and the sofa and beds were comfortable. It was very well located for access to the Taksim area, with many coffee shops in easy walking distance to the flat. If you have mobility issues, I would not recommend, as the stairs to the apartment are steep; and it's a steep hill to the Taksim area and high-street. The WiFi was strong, and coped well with two of us working from home.
As with other reviews, it cannot be avoided that the stairwell up to the apartment is in poor condition; and the bathroom in the apartment is unusual (the toilet is not installed against a wall, and you have to squeeze past it to get into the shower) - though this didn't bother us too much as we knew this when booking because we read the other reviews. During our stay, the aircon was broken, but Burcu was in the process of organising a fix - we recommend checking with Ezri/Burcu before your stay whether this has been sorted, and to ask for some fans if it hasn't, because the apartment got very hot and humid during our stay.