I rented the house for 10 days and this is my honest review.
The strong points:
the house is big enough for a family of 5 members.
the neighborhood is safe (we were 5 women and we didn't face any problems regarding security).
Facilities such as bakeries and supermarkets are close to the house.
The house is very well-equipped, you will find everything you need including cleaning products.
The host is excellent and he quickly responds to the messages.
The house is good for its price.
The weak points.
The house is underground which made the level of humidity very high especially at the beginning because all the windows of the house were closed. Later when we used the house and kept the windows open, the humidity decreased. If you have health problems you should not risk.
If you are in Istanbul for touristic reasons, then the house might not be very convenient as you will need to walk to the bus station and then use the metro which is time consuming.