(Almost) perfectly on time
Pros: In both directions, the flight left within one minute of schedule and arrived within one minute of schedule. I expect a flight to operate within 15 minutes on either side of scheduled departure, and this roundtrip nailed it.
Cons: I don't like the fact that Kayak does not have a "N/A" column, as I don't expect food or entertainment on a short-haul LCC flight. The flight time is just over an hour, so what am I supposed to say about entertainment? And why is there no row for "On time performance?" When I travel on an LCC, this is my only expectation (in addition to safety, of course). My only complaint about the HK Express flight was that I had to work hard to get the attention of the flight attendant to buy a bag of M&Ms