We really enjoyed our stay at the Raven. Perfect neighborhood. About a 25 minute walk to the "New Mosque" downhill. Steep uphill walk on the way home.
Pros:
-Raven Pub downstairs
-Awesome neighborhood near Taksim and Istiklal (great nightlife)
-Balcony was great for a drink and to relax
-Bars are nearby but its not loud at night

Cons:
-A little hard to find at first (google Raven Pub)
-Lots of stairs
-Looks a little different from the pictures (slightly smaller) but was still a great space