Huseyin is a great host - communication is great, we were able to leave bags in the apartment for extra 2 hours, he sent us a short Istanbul guide article he wrote.
The apartment is good for the price, spacious and the area is indeed horizontally close to port with cafes and other cafes closer to Taksim square. Still i have to admit the area is not the most posh if all, a way to port is either ~100-200 steps down or a rather steep and very littered road. The way to Taksim is up, similar number of steps. There is a shop and a good cafe on the same level as the flat though.
The apartment had a lot of spare bed linen, towels, etc. You should not expect very high standard of refurbishment though. Also as for me the street noise was an issue, on Sat loud cars/scooters were occasionally passing until 2AM, although it is a tiny street in the middle of a hill and I closed all windows facing it. Soundproofing is not perfect in the whole house - could easily hear neighbours speaking upstairs. The lady who helped us with keys etc was very nice and helped, although I had to use Google translate from English to Turkish once.
Had some trouble drying towels, possibly due to weather though.
Overall this allowed us to learn the life of a not-so-posh area in Istanbul, quite interesting :)