Yeshim was wonderful and greeted us at her flat after organizing a driver from the airport to her place. The space in the flat was great for our family of four and it was clean with all necessary amenities. We did have a few mishaps including a burst pipe in the kitchen, a water shut-off, a broken chair, and some non-working appliances. Yeshim was extremely responsive to our e-mails and quickly arrived with a plumber and a new electric kettle. The location is absolutely perfect...within walking distance of Taksim Square and the tram into the Old Town. So, while the flat itself definitely had its quirks, maybe that is just what it is like in Istanbul.