I didn't even wear any sweater when I was there last week, just a long sleeved shirt + slacks.
In the MRT or Cab, its not that cold..
It's only quite cold when we are walking outside..
But I spent quite minimal time walking outside, most of the time in hotel, in office or in restaurants.

The dim sum there is... heavenly!

I took cab from hung hom to air port, about hkd 250 to hkd 260.
but i am only alone at that time.