The huge factor I chose this guesthouse, besides that it is in Sultanahmet, is the breakfast. and it didn't disappoint. My husband and I enjoyed the breakfast so much that we would always refill.
Service is tip top. from airpot pickup, SIM card services (yes you do not need to go to a telecom shop to purchase a SIM card) and laundry services. the receptionist was lovely (I forgot to ask for his name) and helpful.
will definitely highly recommend.