Teddie's place is exceptionally home-like and livable, on a great neighborhood block. It's just a couple streets from the Galata Tower but quiet; the bedroom (note the king-size mattress) seems almost soundproof.
The kitchen is well equipped (including good knives and coffeemaking options) and generously stocked with the basics for cooking. (To be clear, you're close to good restaurants also!) It's one floor up: the street sounds are muted and pleasant in the bright living room. The balcony is for just one person but I used it every day. It's a location for endlessly interesting walks to cafes and studios and traditional small shops in the neighborhood -- as well as to Metro, trams, and ferries.
Teddie is a great host, amazingly quick with responses and helpful in every way. This was not our first time in Istanbul: we'll always look for Teddie's when returning.