The nice part about buying from HK is exceptional prices (not in all cases). The downside is bad comms, poor shipping times, and sometimes total incompetence. I can see that they delayed your shipment - if you pay for express shipping 5 days but they wait 4 days to ship it, thats bad customer service in my opinion. But informing you of something they probably have encountered in the past and giving you warning is something they didn't have to do. Thats good in my opinion.
Support a local retailer and buy local, you'll get faster shipping, english comms and don't have to contend with the border or shipping.