Clean and cozy studio apartment. It had everything you might need for a short stay, including kitchen utensils, pots and a pan. Very good location, only 12-15 mins to Istiklal and Taxim square. Despite its closeness to the city center, it's very quiet. Internet connection was good and stable.
What I didn't like:
I had an issue opening the door - the lock was glitching and needed some getting used to. Also the boiler/heater is inside the apartment and when the heating's on it makes loud noise, which could be problematic at night. I used to switch off the heating, so it's quiet for me to sleep, but that option night not work for winter.
I would have also appreciated if I was not charged the full price for early morning check in and check out - I've arrived at 5am and I've left at 5am too. I wish there was a discount for such cases.