My wife was about to go to take a shower, closed the door (without locking) to hang the towel and then tried to open it again, and that's it, she's locked inside !!
To recap, she did not lock the door in the first place !
Contact the reception, who in turned contact the doorman, and in the end contacted the maintenance guy, and all in, my wife was locked in the toilet for almost an hour !!
The lock eventually was smashed into pieces before the door can be opened! (Good lock though)
Needless to say, they changed for us another room and thankfully, it was uneventful :)
Not a bad hotel, in fact, not our first time there, and will be there in the future too, but does leave my wife a phobia and she dare not lock the door even after changing room.
(just imagine if she's alone in the first place and I'm not there to know that she's locked inside !!!)
Pros: Clean and convenient
Cons: The door locks