Giuseppe and his caretaker, Mustafa, were exceptionally hospitable and helpful. They're on-site (not in the same apartment but same building) and easy to contact. I had no issues with the flat while I was there. The flat is uniquely artistic and colorful! You'll enjoy a roomy living room, a cute bedroom with a sliding door and a massive bath tub. Plus, there's a rooftop terrace overlooking surrounding neighborhoods toward the Golden Horn.
A grocery is a 5 along with several kebab places are a 5 min walk. However, full-services eateries, cafes and a few shops are a 10 min walk.
Accessing the flat may be a challenge for some. It requires several buses and trains to reach the place (its on bus line 90B, which requires a transfer from Tramline M1 at Beyazit station). You can also take bus 55T from Taksim Station (M2 line) but the walk from the bus stop to the place requires an intense walk up a massive hill. So it's cumbersome if you have belongings. I flew into Sabiha gokcen (SAW), which is far from the center of Istanbul. DON'T take public transit from SAW to the flat haha! It takes 5 transfers! Instead, use the Havabus to Taksim and then bus 55T. It's cheap and will save lots of time. Or take the Havavus and then a taxi.