A good hotel, attentive staff, a normal breakfast, excellent location, near Taksim Square metro station, many inexpensive cafes with very tasty food, good shops, if I am in Istanbul, I will most likely stay there.
Good location and friendly staff. That's all the advantages. The rest of the cons are dirty, everything is dilapidated and old, rotten breakfasts. There is zero noise insulation, you will not fall asleep at night without earplugs.