I've not been to the QF or BA lounge so can't offer a comparison to those.

But the DNATA lounge is much better than the Skyview one. It's larger with separate zones and plenty of seating and power ports.

There is a full barista service with Australian waiters (or Kiwi). Sandwiches are wrapped in cling film but for breakfast there were hot options.

The ambience was dark but nice and private. I don't mind the dark but I know one frequent flyer who is just scared of being in dark lounges so he probably wouldn't like it.