We greatly enjoyed our stay at pamir's apartment! the neighborhood it one of my favorites in kadiköy, quiet yet central, with lots of cute cafes and places for breakfast (mahatma cafe is a great vegan one and right around the corner).
The flat is huge, so seven people can fit comfortably. The kitchen had everything we needed, even a dishwasher, which is a blessing for bigger groups.
Sadly there was some construction going on in the house next to ours, but they didn't start until 10-11am so you can still get a good night's sleep. If you wake up early-ish and spend the rest of the day roaming the streets of istanbul you won't notice any of it.
We spent two of our mornings having breakfast in our garden with the sun shining on us.
He was a very kind host and quick in answering all of our questions.
I can only recommend Pamir's flat, should I come back to Istanbul with a bigger group of friends I will rent it again!