Ortakoy is a great central location, very easy to get to places like Besiktas, Taksim, Nisantasi, Bebek. Close to Besiktas from where it is very easy to get to the Asian side. The appartment is in a lovely authentic neighborhood. It only takes a 5-10 minutes walk to the famous square and about the same distance to the shopping street with little restaurants en small shops.
The appartment met my expectations completely. The communication with the owner was easy through whatsapp. The instructions how to get to the location and entrance was very clear. The appartment is a spacious studio with everything I needed. I would definitely stay there again during a next visit to Istanbul.