We can totally recommend this place. Situated next to the Galata Tower you live super central. The main attractions and nice areas (in our view) can be reached by foot. The sea is a 5-10 minutes walk away.
The apartment is cosy and fulfilled our expectation. As the area is a bit touristy and the windows not so well isolated, you can hear the noises from the street. But no bother for us at all. We hope to visit Istanbul soon again (our 9 month old daughter enjoyed it too :) )