The place was great, really clean, and it matched the photos and the description.
It's quiet but in a part of town near shopping places and cafes.
Also, T1 tram is near by which gets you easily near all of the main tourist attractions. It's great for 1 person or 2 persons if they are a couple.
Cleanliness was great, the apartment had everything we needed, and Dilek was super-helpful with everything, including Taxi company scammers we encountered (they are called "Donat travel" and they should be avoided like plague).
Additionally, internet was stable and fast enough for people looking to work/travel.
The only possible downsides are that there is not a lot of natural light, given that it is on the ground floor and that you have to walk uphill often, but that did not bother us at all. it's just a thing with Istanbul and this place, and not something the host could change.
For the price, I would certainly highly recommend both Dilek and this place.