There are a few things that I will never be able to stress enough:
#1. If you go to Istanbul, Sultanahment IS ABSOLUTELY the neighborhood you want to stay in.
#2. If you stay in Sultanahment, HIKMET IS ABSOLUTELY the host you want to have, because:
A. His house is at walking distance from Hagia Sophia, Grand Bazaar, Spice Bazaar, Blue Mosque, and so on.
B. HIKMET is the best host you can wish for. He takes care of EVERYTHING and every little detail (transfers, tours, money change, advice, etc.)

I feel my wife and I met a friend in our honeymoon, and we will never be able to thank HIKMET enough for his help.
We will always remember the amazing breakfast he prepared for us, and the invitation every night to join him and other to share a narguile in the wonderful terrace his property has.

If you go to Istanbul, do not doubt it, go with Hikmet!!

Dr. Gastón M. Marano