This address on tripadvisor is not the exact location of this hostel, which is really disturbing and confusing. There was no reception and we had to call the phone number offered and found out that the only staff (the owner of the hostel, maybe) is a locksmith. In order to enter the hostel, we had to walk through an alley and get into a strange door (sort of a back door of the lock shop). It smelled pretty bad and disgusting when we enter the ground floor.
The wifi reception is also disappointing. The room is much smaller than we thought and our floor was a total firetrap.
There is no any certificates in this hotel. I won't stay here ever again.