I wanted to share my experience on this apartment for 10 days.
Ms Basak was the host and she was always helpful and answer any question that you have.
The house has all the supplies you need to live. You can literally wash and dry your clothes in 3h.
The area is quite quiet, sometimes u can hear the other apartments noise but is not much often.
The check in was easy.
I can say that the location seems a bit scary but after a while your get used. On the Main Street your have some small businesses, and supermarkets where you can buy essential things. From the house you can pick bus in 3 areas , on is on the main street, other is the metrobus that can take u to the Asian side quickly, and down the hill u also have bus that goes to basically any area like taksim and eminonu.
From my experience I think you should use transports all the time because is cheaper and easy to use. Just buy a istanbulkart, charge it and you can use it in any transport.
About the house: the beds are comfortable, is enough spacious for 3 or 4 people. The internet is also decent.
I recommend the apartment because even the location is not the best, you have everything you need on the apartment.