We really liked Villa Galley. The room was pretty, clean and bright, the bathroom was always clean and there were no unpleasant smells. The Wi-Fi connection was surprisingly good. We enjoyed free water and soda in the fridge. The hosts (Can and Timur, who speaks Russian) were always helpful and we literally had nothing to complain about. We thank hosts for their hospitality and we will be glad to stay at Villa Galley when we visit Istanbul again.
The location is really great - it's 10 minute walk from both Divan Yolu and Sultanahmet, but at the same time it's quite and there are plenty local shops or cafes around.