Pros - great location. 2 min walk to Galata tower. lots of restaurants, cafes, shops all around. quick walk down to the ferries. bit of a longer walk to the subway, but doable. close to everything. really nice views out from the roof top terrace. Had someone meet us and help w/ finding the place and carry our bags.
be aware that the building is next door to a mosque, meaning there are calls to prayer in the early mornings.
Cons - earplugs likely needed. bedroom windows face the street and can hear people talking. garbage truck can come in late/early hours which is loud. the unit itself is showing some regular wear and tear, but mostly fine since you'll likely not spend too much time in it. however, the shower is in poor shape and needs maintenance. since there is no door or curtain on the shower, all the water sprays out unless you try to position yourself in the corner. you can see water damage around the baseboard and wall under the window and some mold on the bottom.