We had 8 people in our group, 5 adults and 3 kids ranging from 13 to 5. All of us were able to fit in comfortably as there were sufficient beds. The the 4 bathrooms really helped in the mornings, and this is a huge advantage over most other apartments we saw that had just one bathroom.
Kitchenette was quite well equipped with plates and utensils, as were the bathrooms. The location is very good too. It's a ten minute walk to the blue mosque and Ayasofya, and there's a restaurant and laundry just a minutes walk away. Farouq and Murat were kind enough to accommodate our needs.
One thing to note is that this is a set of 2 bedroom and 2 bathroom apartments over multiple floors, and not one large apartment. There is no lift, so if you're carrying a lot of luggage you may have trouble if you're on the higher floor.