This is a great place to stay to explore Istanbul. It’s clean and modern, with nice touches like travel soap/shampoo in the toilet and a variety of dishes and glassware. It’s an easy walk to Taksim Square to get to the network or İstiklal, and an easy walk to the ferries or the T1 tram to the historical sites.
The only caveat is that it’s a very hilly area (read: streets being giant stairways). Taksim Square is uphill, but not very far. The T1 tram (Fındlıkı) is downhill and quite steep. Walking back is doable but unpleasant, but I learned to get off at Kabataş and take the funicular to Taksim. Upon arriving, I was very glad I hadn’t taken the airport bus to Taksim—I wouldn’t want to with more than a backpack.
Great stay, and I would definitely stay there again.