I am quite surprised by your bad comment while you wrote to me that « everything was alright » ; why would you have faced to so strange events (flies, electric shortage, wifi issues) that other guests had never experienced ?
1/ flat’s size : as it is mentioned in the title of the flat, flat’s size is 30 square meter, no more no less ; you cannot expect to find another size
2/ unconnectable, interruptive and slow wifi : I don’t know how wifi is working in Hong-Kong ; flat’s wifi network is 200Mbits/sec, and defined by the operator as very high speed network ; I live in the same building and use the same wifi network, and it works very well for me
3/ unhygienic sofa, bed and bedding : obviously wrong
4/ flies : no problem of insects in Paris ; I fully disagree, it is totally wrong
5/ fuse jumps many times a day : it NEVER happened with other guests ; electric board is new