I found this place to be an excellent location and value. It is about a 17 minute walk from the Havaist bus stop at Taksim (print out the map that Pelin sends you). I love historic neighborhoods with cobbled alleys and old houses, many of which have fallen apart. If you like to walk, there is much to explore locally. I walked all the way to the Topkapı Palace on the other side of the Galata bridge, just 3 kms/2 miles away. Of course, you can take the tramway there, which is walking distance at Tophane. Some nice breakfast and dinner places nearby.
Last, but not least, Pelin is a very kind, helpful, and gracious host! She responds quickly and has many suggestions to make your life easier.