This is more a critique/review of the Beyoglu neighborhood than Dilek's apartment.
Dilek's apartment is exactly like the pics. It is large and can accommodate quite a few guests. It is very well stocked: even the kitchen with big cans of drinking water (which most other Airbnb's do not provide). Although we weren't sure if the toiletries were stocked by Dilek, or left over by previous guests, but they got the job done, so no major complaints there.
Apartment is on the ground floor/basement, so all windows open at the street-level and have to remain covered to get some privacy. This was a big negative for us, as we were holed-up in the apartment for 3-4 days due to an unwell child and were getting claustrophobic.
Beyoglu as a neighborhood is not as pretty as Sultanahment. It's great if you want to party with friends (being closed to Istiklal), but I would not recommend this for a family with children.
Dilek's apartment is exactly as per the listing. Make sure this is what you need.