It was our second time in Istanbul, first we were in a hotel. After our stay, I can tell you to choose an AirBnb, and to choose this one in particular. The apartment is really beautiful, well-appointed, calm and super well-located. We love visiting Istanbul and to be in the south of Beyoglu is perfect. You are near of everything (Galata, Taksim, Eminönü,...).
And most of all, I recommend you this apartment for the owners. They are lovely, warm-welcoming, available and always ready to help or advise you.
We enjoyed our few days in Istanbul and we felt like home thanks to them. So, once again we thank them a loooooot.