The apartment is excellent, as described, smell fresh, well lighted apartment, clean bathroom.
Location is great - within walking distance of the key place of interest - well we walk to Taksim Square !!! (but with many ice cream break,coffee break etc). Walk to Grand Bazaar is about 15 minutes.
Sami is a great host, with attention to detailed which made our trip very pleasant and carefree - eg : potable water in the kitchen (save us a trip to buy potable water ), met us where the taxi drop us (hey - this great else we have to figured out how to get to his apartment), send us to train station and was generous in lending us his Istanbul card. He was gentlemanly in helping to carry our luggage up 3 floor.
We had a late flight like 1.30am and Sami was flexible in allowing us to leave the key, check out and meet us again the evening to pick the luggage on our way to airport.
Transport from airport.
We flew into Shahiba airport (SAW) and flew out via Ataturk airport.
If you are staying at Sami place, better to try to fly in via Ataturk as it is only 1 hour train ride, right to the last stop - Aksaray.
From SAW, we took a Havas bus (14lira) to Taksim (supposed to be one hour), then a taxi from Taksim to near the apartment.

If you dropped near Taksim and want to take a taxi, walk away from where you the bus droppedyou . there are tonnes of taxi hanging around, but they quoted like 30-40lira. I walk to a nearby street and bargained for 15-20 lira. We were lucky to have a happy-go-lucky taxi driver who called Sami on the phone for his address.

We arrived late ( like 8.30pm?) reached airport about 5.30pm(?) and was charge late charge of 15euro (ouch!!). To be fair, Sami listed it in his posting though I did not read it and did know about it.
So, it is frustrating, because of circumstances beyond our control - we arrived late - bus journey to Taksim was easy but there were major jam and the journey became 2 hours. Taxi abound but they kind of "collude".
However, as Sami met us at night where the taxi dropped us.

PS: If I redo the trip, will fly in via Ataturk, make sure I arrive well before 7pm. Or take a train from Taksim to Vernicileiz stop, which is only 2lira. and walking distance to Sami apartment.
Thanks Sami , will stay at his apartment again.