Fantastic property and an even better host.
Location is excellent. You're a short walk away from Taksim, and also a short walk away from Kabataş tram stop, and just not far from all the major attractions in Istanbul.
The apartment is very spacious, clean, well furnished. It has fantastic light, large, double-glazed windows that block out the noise from the streets, but that also open wide to allow breezes to cool the apartment.
The bathrooms and kitchen are modern and top-notch, and come withe very new appliances. The TV is absolutely superb, it's large and comes with Netflix.
Finally, the host (Mustafa) was exceptionally communicative and accommodating. He would respond promptly, in fluent English, and was very friendly.
My wife and I very much enjoyed our stay here and highly recommend it!