Our hotel in Istanbul helped us to make the reservation, because the people at Yesemek speak very little English. In spite of this, we had a great (short) stay!
The room was large, not really 'charming' but definitely comfortable and clean! The bathroom was also fine with hot water and everything you'd expect. We got up a bit late for breakfast, but (after a bit of negotiation) they were happy to bring us out some food and tea (looks like the normal breakfast buffet is really good).
All in all, I'd definitely recommend this centrally located and good-value hotel to travelers keen to discover the capital of baklava, pistachios, and mouth-watering kebabs!