Regarding Mrzlica, I can say that the service is excellent since the new caretaker arrived. Sometimes you just have to wait a bit because there are quite a few hikers on Sunday mornings. I advise you to head to the mountains in good spirits, positively minded, then neither the service nor noisy hikers will bother you. Otherwise, it's better to stay home or go to some peak without a hut, where you can enjoy the peace and not criticize everything.