We've just had wonderful Christmas in Istanbul (for the Austrians: Islam statt Daham ;-) and in Tolgas flat.
The flat is small and beautiful. There is everything you need and its atmosphere is really cosy.
Above that the flat is located in a quiet side street in Galata. There are absolutely wonderful cafes and bars within 5 min walking distance (also a bakery, a traditional restaurant which does take aways and a small convenience store just around the corner).
Walking to Sultanamed takes appr. 30min.
Tolga is a very helpful host, proactively contacting us and providing us with all the information we needed.
Last but not least Wifi was working perfectly.
It all boils down to this: We can highly recommend the flat and Tolga as your host in Istanbul.