I and my family (6 adults + 1 baby) stayed in the apartment for ~2 weeks, and overall, we had a pleasant experience. The location of the apartment is fantastic - the Galata Tower is right outside the window. However, it is worth mentioning that the location can be quite loud at night and may not be the best fit for families with young children. Additionally, it's also located on a hill, so if you have a stroller with you, it's hard to move around.
The apartment itself is clean, comfortable, and well-appointed, with everything we needed for a comfortable stay with a baby. Mr. Hüner was also very friendly and helpful. Despite the noise and hill, I would recommend this apartment for those willing to trade a bit of peace and quiet for the convenience and charm of being so close to the Galata Tower.