I enjoyed my stay. The studio was very clean. The airconditioning and wifi worked well. Although the street could be noisy, the double glazing was effective, and the street noise did not go late. I was able to sleep well, even though I am a light sleeper.
The location was great. There were food shops, restaurants and a money exchange close by. For transport there was a taxi rank at the end of the street, and the studio is approximately 320 meters away from Yenikapi metro station, from where you can catch the metro (red M1A line) to the airport (Havalimani), or bus station (Otogar), to Taksim or to Sirkeki, to see the sights.
The washing machine and dryer is on the first floor (there is an elevator), and there was an iron and ironing board in the room.
Checking was easy, and any issues wre dealt with promptly. All in all a great base for exploring Istanbul.