Aysu was a great host. It felt at home with beautiful interiors and design. The place was extremely clean and tidy with sufficient amenities provided by the host including a turkish coffee maker. It is surrounded by various picturesque cafes, the best baklava right at the doorstep and near to the Galata Bridge for walk over to the other side. There were a few vegan option restaurants around as well (Tahin - a Lebanese restaurant). Places were nearby on foot.
The only issue faced was the music from the bars/cafes below. If you are alright with the music from the bars, this is a perfect place to stay for a trip in Istanbul.