Just my $0.02 for whatever it's worth. I just had my first A359 flight on CX890 HKG-EWR, I was originally booked to fly to JFK a few months ago but received notification that the flight has been cancelled and I was rescheduled to the EWR flight. Wasn't too happy at first but decided to go with it.
I was in J and all I can say is that I was very satisfied overall. The aircraft is remarkably quiet and after a 14+ hour flight I got off less tired, dehydrated and jet lagged than I have been taking the 777's longhaul, and for that matter even better than the 787.
I am not a frequent traveller on CX but service in J was spotless. Food and drink was good and throughout the entire flight the FA's kept walking up and down the aisles frequently checking in to see if anyone wanted/needed anything. Overall I was impressed and would fly this flight again.