We chose the Mest Hotel for a four day trip to Istanbul, partly because of the location as it was centrally located close to the tourist attractions, and partly because of the attractiveness of the property and the rooms.
We selected a Loft Suite because the price was really low, and we were very pleased with the room. The photos are accurate and the room was very comfortable, especially the bed. The bathroom was small but it's an old building, so there's not much that could be done about that. The rain shower was wonderful, with great water pressure and hot temperature.
The breakfast in the rooftop dining area was good, and included in the room rate, although I don't recall this was mentioned in the Expedia listing. There was plenty of choice each day, with both cooked options and cold continental options.
The staff were amazing and so helpful. My wife found that her coat had a tear in the seem and the staff took it out to a tailor and got it repaired within an hour or two. They also handle some laundry that we needed done, and arranged a sunset cruise on the Bosphorus for my wife and I.
The staff really were incredible, and as someone who's stayed in higher end chain hotels with Hilton, Hyatt, Marriott, etc. they were way better than the concierge services I've received from those chains.
I would absolutely stay at this hotel again and recommend it for anyone who wants a comfortable room, in an historic building, walkable to all the sights, with exceptional service.