Accurate in their advertisement and photos for two of their places I stayed in.
Better than a hotel - having a bedroom, sitting area and small kitchen - plus appreciate the washing machine and the ranks to hang to dry clothes. Plus they have availability 24/7 as needed. So quick with responses and willing to go the extra mile/kilometer.
Whenever I return to Istanbul, I won't look around as the hundreds of locations, but will look to see what Guner Berivan - Istanberry have available.