I am writing in English so that more people can read this, and I hope it is useful.
First, the hotel has no reception, no service, no cleaning, no repairs, and no support.
Second, the room was very smelly, and the floor and the toilet were dirty.
We spent two hours trying to get an entry code with the help of a kind woman from the neighborhood. We argued with the hotel staff on the phone, and they told us in Czech (as translated by the kind neighbor) that people can wait if necessary. It was unbelievable.
In short, the owner of this hotel chain (Aresz) does not have enough capital to organize a properly functioning hotel with a competent service crew. They interestingly call everything "eco." The staff were unprofessional and impolite. If anyone needs a cheap room and does not care about comfort, this hotel chain is exactly what you need.