My stay has been of 1 month and everything has been smooth and an awesome experience overall. George, the host, is super kind and always ready to help you (both via WhatsApp and in person), he helped me check-in before the time, called a nurse for the final PCR test, teached me how to play backgammon, tips for the city & gym and much more, really the perfect host!
The place is really nice as well: bed is comfy, the desk allows you to work from home if you want, wardrobe has plenty of space and the bathroom is pretty big, with a shower cabin allowing you to take a shower without the worry of wetting everything around.
This is now my go-to place when I come in Istanbul, highly suggested to everyone.