I fully agree with -brunos- HK Express is very much a LCC absolutely no frills but a newish fleet and polite and helpful
staff - it works.
Very little benefit being a Cathay 'club' member though -no lounges of course.
I was struck by how young were both the staff and passengers - very possibly most of the pilots also .
I also flew on Bangkok Airways this trip and as always impressed. Good legroom (v tight on HK Express) They have lounges open to all- simple and basic but decent
The even managed to serve a hot full lunch or dinner and wine on the 85 minute flight between Bangkok and Phuket
They are a good budget choice and code share with Cathay