I had the pleasure of staying in the penthouse for one full month and really enjoyed my stay. The staff was always available and incredibly helpful. The apartment of course is quite beautiful. The large table was perfect for me to setup my laptop and get to work without any issues. WiFi was fast and reliable, each floor has its own router which was great and ensured I don't encounter any problems during work. Location of course is what really makes this place standout. You are seconds away from Galata tower, Sishane square and the rest of Beyoglu hot spots. Being able to see Hagia Sophia and Sulemania mosques from the living room is quite an incredible feeling and the sunsets were something to look forward to every day.
I would tell other visitors to note that the apartment is six stories up and there are no elevators. This was great for me as I liked the exercise but I know this could be a problem for some people. I was also here during August and the apartment, being on the top floor does get hot during the day even with the AC on. But despite this, I would highly recommend everyone to stay here as it is certainly a great experience.