We fell in love with Sebnem's airbnb and we recommend it for larger groups.
the apartment is in a very safe area in a street full of boutique stores, which are mostly whole sale. as result it is very quite after 7 pm when stores close, and extremely safe to walk around. Taksim is one metro station away, and lots of restaurants in walking distance.
It also felt like very recently renovated. all furniture were brand new ish, beds were comfortable, and kitchen was spotless, stocked with of all necessary cooking equipment. My favorite part of house.
Showers were also spotless, brand new, with jetted tub in one of the bedrooms.
plenty of windows to get fresh air, and ac in living area and one of the bedrooms.
check in was very easy (smart code) and parking was just 2 bucks a day overnight, 3 minutes walk away. Host was kind to share all GPS locations before hand.
a few things to consider is that the apt is on 4th floor, and does not have elevator, so if you have mobility issues or lots of heavy luggages, you might want to consider that. The other thing is that the street in front of the house is narrow, and one way, with no shoulder area to park. so loading and unloading of your luggage has to happen quickly.
Check out was very easy.
overall we loved the place and enjoyed our stay. would definitely stay again when I'm back in Istanbul