Great place to stay especially if you are with a slightly bigger party and it is your first time in Istanbul. Because of central location you can easily get out of the immediate area (which is more touristy and crowded) and to other places via metro that is two steps a way, or the ferry's from the multiple ports down the hill.
Firat was in constant contact with us helping to make our stay better.
Only thing Id mention is the lack of screens on the windows, mosquitos could be a problem.