I'm still at Malik's now.
I booked one night via AirBnb but just agreed with him to extend my stay for two more nights.
The place is a 2-minute straight line walk from Taksim square and is very neat and quiet.
Everything you need including public transportation is within walking distance.
The house itself is very clean and has all the amenities you need.
Malik is a very cultivated man.
Even if you are an introvert like me, you will enjoy having a conversation with him.
Any topic that you're interested in, Malik will have something valuable to say about it that you will learn from.
He also speaks perfect English and a bunch of other languages!
I am definitely booking his place again when I come back to Istanbul!