We enjoyed our stay at Joelle's place. It's a pretty central location. There is a Migros (grocery store) across from the apartment with ATMs and a taxi stop right down the road. The metro station is about 10 minutes away but we mostly used Taxi services. A ride to Eminonu/ Fatih (where the touristic attractions are) is about 20 minutes and costs around 35-40 Turkish Liras depending on traffic. You can also take public transportation to save money but that can take up to 1 hour. Also the big Cevahir Mall is about a 15-20 minute walk from the apartment which was nice and there are plenty of cafes along the main road to there. Note: the apartment is located on the 7th floor. There is an old elevator in the building that kind of looks scary but we personally had no issues during our stay. There were plenty of towels and sheets provided for us during our stay.