Would not recommend.
Unfortunately it was super loud in the flat, even with earplugs sleeping was hard:
The apartment is above a bar. That means loud music and people till 3 a.m. The stairs in the stairway are out of metall. Whenever somebody walks up or down the stairs, the whole house will here it. As the stairs are also used by costumers of the pub, it is very loud till late at night. During our stay there were also builders for two days, hammering and sawing for hours. Host was not helpful when approaching him on this.
You smell smoke in the room and the towels, though there is a "please don't smoke" sign.
Pro: Raven's place is located very convenient close to Istiklal and Taksim. Good to reach via public transportation. AC works.