The apartment is located 10 min walking UPHILL to Taksim Square where you can take the subway Line 2, the bus to the airport, or different buses to Besiktas or Kabala port.
It is exactly like the pictures. It is a 5th floor and the terrace is absolutely gorgeous. The views are fantastic and it's a really nice place to have breakfast, dinner or some drinks.
The apartment has not A/C but Edip (the host) provided a fan which I didn't have to use (August) since the apartment is very airy and I could sleep well the whole week. The kitchen has an oven, a coffee machine, dishwasher, washing machine but no microwave. It also have plates, silverware, etc.
Edip is a really nice young host, easy going and quick answering any question. He even insist in meet me up at Taksim Sq. and walk me all the way to the apartment helping with the luggage. Speaks English and you can keep in contact thru phone or Whatsapp. Checking out was also a breeze and he let me do a late check-out.
The neighbourhood is a typical and local one and could look rundown and dangerous, but it isn't. In fact is really safe like all Istanbul and a lot safer than Barcelona and other European cities.
Close by (3 min) there's a supermarket BIM in Akagalar Cd. If you walk uphill 5 min in the opposite direction to Taksim Sq. then you can reach Kurtulus Cd which is a main commercial and nicer street where you will find a Carrefour, a nicer BIM, A-101 or Sok supermarkets and places to eat or have breakfast.
Nisantasi is a high-end and posh neighbourhood and you can reach reach it either walking 10-12 min or by subway. There are a lot of cafes, shops and restaurants.