I've stayed at Irem's place for a week. Location is just the best for Nisantasi, Tesvikiye area and it is one of the most popular street for local pubs and restaurants. The apt is at the top floor so you won't have noise issues. The apartment is so nicely decorated and you'll find every equipment you'd need. It is a real home not just a rental bnb. A great TV with a great sound system, very well designed lightning and the kitchen will amaze you. All amentities are better than you expect.
Irem is a great host, she'll help and explain everything. Very easy to communicate with. I strongly recommend Irem's place.