The experience was great, until it was not. Everything was going well at first, until I forgot my card keys in the room.
Since the room was registered under the names of several other guests who also stayed in the same room previously, the host only registered my sister's name in the room. Thus, I am not one of the registered guests and is unable to request a temporary key from the lobby. I had to pretend to be someone else and lied to the hotel staff to get a temporary key issued.
I couldn't use my sister's passport to get the key because she only stayed 1 night for transit.
In my honest opinion, it feels like we're doing something illegal here and is not worth the trouble for a little discount. You're better off paying the asking rate of the hotel from their official website for best experience.
Another shout out to the host who kindly stayed in touch with me the whole night until I managed to get a temporary key issued. Thank you!