Superb location! You can easily walk the bridge and get to the attractions of the old city, or hit up Karakoy Gulluoglu for a late night baklava. The view from the rooftop terrace cannot be beat! Unfortunately, there is only 1 table up there and you can’t bring up extra chairs.
The apartment was clean, but definitely benefits from professional photos in terms of style. AC doesn’t run very cool, which might be an issue for summer visitors. Wifi is slow like other visitors have mentioned, but what are you doing surfing the web indoors in Istanbul in the first place?!