Quite a cozy apartment in the greatest location ever in this part of Istanbul - you will never regret the place. Major sightseeings are just 10 minutes walk, lots of restaurants, places to buy a SIM card, currency exchange and shops.
I would expect at least a few bottles of water as well as a couple of slippers though. Please also note that there is no lift, so if you carry large bags it is worth asking for help in advance. The host is polite and friendly. My only feeling that the apartment was a bit overpriced and does not meet the criteria of being luxury, but the pay probably was worth it during NY eve.