We had a great time at Martin's apartment.
Martin is a great host, arranged for us flexible check in and allowed us to stay a little longer when checking out, was in touch and provided valuable tips on the area.
The apartment is conveniently located. On one side you have quick access to Taksim and Istiklal, on the other side you can quickly go down to the Bosphorus and take the Karaköy and Kabatas ferries.
Close to everything you need for life - stores, supermarkets, restaurants.
Internet is fast enough to work remotely. The towels and linens were well washed and had no extraneous odors, not all hosts do that.
It is also very convenient that you can adjust the water temperature and heating by yourself.
Highly recommend Martin's apartment.