Great location on a busy street, great stay. Apartment is on the smaller side, esp. the bedroom, literally only the bed fits in there, nothing else. but it's a big enough space for 1-2 people I'd say.
Sisli is a great neighborhood to stay in, and i would def stay in this apt and area again. It was the end of a one month stay in Turkey for me so I had a rental car for one last day. You'll definitely not find street parking but there's a mall down the street that has an otopark (parking garage). The metro station is 50m or less away down the block, perfect. Took less than 30 mins to get to the main tourist areas like Sultanahmet Square.