Spent 3 nights here. Meso was very flexible and responsive. allowed early check in. Place is very neat, clean, and sufficiently appointed. Nice little balcony overlooking streets and shopping corridor near the tower.
Located near the center of everything including taskim square, Galeta and the old city. Lots of great restaurants and bars on Istiklal street in walking distance. Be careful getting luggage up the cobblestone streets and arrange a taxi.
Would definitely stay here again when I return to Istanbul.