The accommodation is perfect! We were a group of 5 - 4 adults and 1 kid, there was plenty of space for us. We were there just 3 nights, but the apartment has everything you need - the kitchen is fully equipped and there is like a wardrobe dedicated space, which is so cool.
I was looking for the apartment near the Galataport, and this one is just short (steep, but very short) walk from it. We were with my husband's parents, who are in their 60s and they did not have any issues walking up.
The communication was perfect also - all of our questions were answered and it was a great stay overall!