Even if they say it is an "Adults Only" hotel, you will see children around which was our first disappointment. We planned to stay at a peaceful one, but instead we have gotten a noisy one. Their room's noise isolation is close to no isolation at all. You will be hearing all the noise from the pool and visitor's conversations just beside the pool. In addition to these, room's toilet was stinking, beds and pillows were not comfortable at all and we have woken up because of back pain at least once a night. The pool was not clean enough therefore, we haven't even tried it.
Their breakfast was good and staff was really nice and kind.
Overall, if you wish to stay at a hotel of which staff is nice and kind you can prefer Derin Konak. But you would have given up on all of your comfort for it.