The location is really good, lots of cafes and restaurants nearby. The hosts were really nice, we didn't need any recommendations or tips because we were visiting a friend who's an Istanbul local so we didn't end up speaking to them much but I'm sure they would be really helpful if you need the help. The room where we stayed was nice, the bed is a bit small so watch out for that if you think you need a lot of space. We felt really safe even though you can't lock the door to the room. The door is also a bit hard and loud to shut. If you're allergic to cats I wouldn't recommend staying there because there was quite a bit of cat hair everywhere. We were allowed to use the things from the kitchen which was especially helpful for water because it's not safe to drink the tap water in Istanbul.
Overall I would definitely recommend staying there if the things I mentioned don't bother you :)