Deniz's place was a lovely stay. The apartment was very clean and decorated with excellent taste. Beds were comfy and there is a lot of space in the living room. Multiple workspaces as well for remote workers. The wifi was good, a little weaker in the living room but still useable. The location is perfect, right in the heart of Besiktas and very close to the Bosphorus coastline.
The best part of the stay was Deniz as a host. He was very attentive and easily contactable. He even knew I was a football fan and left me a Besiktas scarf as a gift!
The only slight negative is the noise. Being in the middle of Besiktas, this is to be expected but it seems the people here never sleep!