We spent nearly three weeks at Erhan’s place and really loved overall experience. The location is absolutely great, just a few steps from Istiklal street, however quiet. We almost did not hear the neighbors. The flat itself was nice, spacious enough for two adults (I think for 3+ pax it would be not so comfortable). The check-in and check-out were comfortable, the host Ümit was eager to help during our stay.
Things we did not like were the Internet (okay for e-mails and chats, bad for video calls) and ants in the kitchen. They were harmless but a bit annoying:)