HobbyKing are in an unenviable situation insomuch as I'm pretty sure there are more than a handful of unscrupulous people who would try to "rip them off" by making unsubstantiated support/refund claims.
I'm also aware that the postal system out of China is pretty variable these days. Sometimes stuff arrives really quickly, other times it can take weeks.
Fortunately I have not yet had to claim a refund on something that didn't turn up or was missing but, anyone who buys enough stuff will almost certainly encounter such a situation eventually.
With so many operators getting in on the online RC products market out of China now I think HK and the others will eventually find that low prices are but one factor people consider when buying stuff. Just as important is "the putting right" when things go wrong.
We live in interesting times
RCModelReviews.com, just the facts.