Fantastic place, the best choice for five friends re-union after almost 50 years. Location, you can not beat. 5 minutes away from tons of restaurants and shops in one of the best touristy area of Taksim Square and Isteklal street. The unit is spacious with large living room and 4 bedrooms and it is clean with pretty much all needed for comfortable stay.
The only warning: It is located on the fourth floor and need to climb 82 steps to get to the unit. We were all in our late 60s and relatively fit, so ok. However; if not fit, it can be an issue going up the steep stairs. We were aware when we booked.
Overall I give it 100 out of 100 and thank the host for being always available for any questions or issues.