I would not say that HKUST is unknown outside of HK.
It has been the #1 school in Asia a few ratings. There are not that many bschools in Asia, so everyone tends to know HKUST, NUS/NTU, and CEIBS. Ceibs is in China and that does not make sense to attend if you are not going to work in China. NUS is great for Singapore and HKUST has also been sending people across asia since HK does still carry a need to know the local language. A lot of times you won't' be able to use English with people on the street, esp the older generation. I remember getting in a cab at the Airport of all the places and telling the cab driver my destination in English, then in Mandarin, only for him to tell me he does not speak Mandarin
P.S. I do have a bit of an affinity for HKUST, I have spent a semester there so perhaps my input is impartial but it is something I can relate and personally comment on. All second year HKUST students go on an exchange to other universities. That is cool though it can hamper with recruiting since you won't find a job while visiting Tuck, Kellogg, Booth, LBS, or a slew of other schools
https://www.mba.ust.hk/ftmba/the-program ... ge-programIt is a pretty awesome opportunity since everyone goes. Again, I am not sure how it helps/hurts recruiting but that is something the current students or school adcom can better answer.