The apartment is right next to the Galata tower, so it’s one of the most touristy places. I guess it might be a bit loud in the normal times, but when we stayed everything was closed in the evening, so no noise from the street.
Appartement is very nice, spacious, clean. Very comfortable bed! And it has everything you might need in the kitchen, so good for long stays as well.
The only thing you need to get used to is a mosque nearby: they start signing very early in the morning. But that’s a common problem in Istanbul I guess.