Pros:
The apartment is as displayed in the photos. Really spacious and clean. It is near the famous Istiklal avenue with around 10 min walk to the middle of the avenue. By the time we left, Erkut was due to install a new A/C. So, should have the 2 bedrooms and the living room all air conditioned. It is located on the 6th floor with good view of the sky. The elevator works fine.
Cons:
Actually the apartment itself is on the non-tourist side of Beyoglu. So, expect several locals and kind of industrial shops around which is not a harm. The street itself is an important link between the tourist area and the common area. It is busy and noisy with no area to stop your car if you got one. But you can find a parking garage at the begining of the street which we paid TL50 per day. Also, if you close the window to run the A/C or heating, then you can avoid the noise. You might end up getting used to it.