It is an excellent place! My husband and I stayed at Fatih's place for 2 nights. First, we arrived very late, and I was worried that check-in would be a problem, but Fatih handled our check-in & check-out process with no issue.
Apartment location is accurate and really in the center of everything you may want to access in the city. It is also very safe. The place was spotless and very modern.
The only thing that I would consider as negative is street noise. It is not intense, but we are not used to it at all . We did not consider how busy Taksim center is even at night. It would not be a problem for those who are used to or want it.
I highly recommend everyone staying at Fatih's place!