We were very happy with our stay at Güner's apartment, the communication was great right from the beginning and the team were also extremely kind and helpful.
The apartment has everything you need for a stay in Istanbul including a well-equipped kitchen (there's even a dishwasher), modern bathroom and comfy bed (also a pullout couch if needed).
Location is great with mini grocery stores, markets and restaurants nearby if you are there on Sunday there's an amazing huge walking street market just around the corner too.
Only a short walk to Istiklal street and walking distance to some other great spots as well it's a bit longer but we walked to Karaköy and had a meal at the restaurant under the bridge or you can easily get a taxi to explore, they can arrange one for you if needed or download the BiTaksi or Uber apps.
The neighborhood felt completely safe and we comfortably walked around during the date and late in the evening coming and going during our stay without any concerns.
I'd highly recommend Güner and the Berry Life Apartments for your stay in Istanbul, it was especially nice for us as we booked last minute in the evening and they replied quickly to arrange the apartment for us and get us checked in.
We weren't originally thinking to stay in that area of the city but we were glad we did as we had a great time exploring from this location.