i had a syd -christchurch with JQ, i agree to the fact that i had xs luggage but to be told its 9 ks 90 dollars was plain rubbish, the beatch ACTUALLY wrote on the back of the luggage dockets 8 kg XS, she turns around to me saying no its 9, not 8 i'm like yeah so why did you write 8 on the dockets, she replies oh its airline practice to round it up.
Tell you what i'm gonna be wearing my ski boots at check in on return. might have to take them off at security screening tho.
hope she enjoys her commission
ps. they let you go away with 21kg per person, but anything over 21kg gets charged retroactively from the 20kg limit.