We stayed at Engin's apartment for six nights during the August holiday. We loved the place (and Istanbul!). It's spacious, clean and comfortable, with an incredible view of the Golden Horn. It's in a quiet & very friendly residential neighborhood with nearby small grocery / fruit & veggie shops that are open late, not to mention a shop that sells nothing but nuts. I was tempted to ditch my clothes and fill my suitcase with pistachios, alas my girlfriend dissuaded me... The heart of Beyoglu is under 10 minutes walk away, that neighborhood offers seemingly endless exploration opportunities. The Aya Sophia and other main historical sites are easy to reach with public transport, around 30-45 minutes away. All said it's one of my best airbnb experiences in one of the world's truly great cities. Most definitely recommended.