The host left the house to us in a filthy state, dirty socks in the bed and grime in the bathrooms. Had to spend a full day cleaning just so it was livable.
Location is okay, not so far from Kadıköy but keep in mind finding taxis here willl be difficult and the public transportation isnt great either.
The flat is on a very busy road so expect your days to be loud and unpleasant but nights are okay and quiet.
But the real reason not to stay here is for the host. Despite them leaving their cat with me to take care of last minute (which I did happily), doing deep cleans of the house etc. the host decided to charge unreasonable amounts for wear and tear damage on her kitchen pans.
I stayed there for a month so of course some wear and tear would be expected within reason and even so I still paid for damage which I owned. However she insisted on an unreasonable payment and created fabrications on top to get more from me.
This is the greatest reason I wouldn't recommend this place. Although you can get used to it after cleaning and might even be content to stay (if you are out in the daytime/evening when its most noisy), I wouldn't recommend this place simply for the risk of having to deal with unreasonable demands and fabrications from the host.