We unfortunately left some valuable objects in our room (506) at the Hotel Residence Mala Strana. Everything was stolen. The thieves easily forced their way in. The Prague police inspector told us that this hotel's doors were very easy to break in with a plastic piece.
Curiously, only our room was a target and it is very easy to exit this hotel without being seen by somebody at the desk. So, the security is 100% inefficient and we don't trust anybody in the staff of this hotel. In our opinion, it is a place to avoid absolutely.