I've bought things from them, US and international. International took 2+ weeks, but all arrived as expected. I have yet to test the components, though. US warehouse I've had no issues to date with shipping or defective products.
That said, I've now bought three OrangeRx 9ch DSM2 receivers. Two from one supplier on EBay in the US (only HK option was out of stock international) and one from another supplier on EBay. First two both had bind issues. 1st one after a week of working as expected, it started losing bind, and the the last day before I sent it back for replacement it wouldn't enter bind mode at all and no LED came on when powered up. Second unit I ordered (before sending the 1st back) powered up in bind mode. I wasn't ready to bind so I powered it down. A few minutes later when I was ready to bind up, the LED came on solid with the bind plug in and I can not get it to enter flashing/bind mode now. I ordered another (3rd) from a second vender to see if his stock is any better. Waiting on it and the replacement for the 1st still.
In the mean time, I found a Spektrum AR7000 on Ebay and grabbed it. Plugged a sat into it. Bound up no problems, works, no problems. Only problem is it is 7ch and I need 8 for the application I'm using it on.
So I'm $130+ into receivers for a project that is a throwaway mod to my 350QX, thus the reason I was buying OrangeRx crap to begin with. I'd use DSMX recievers, but I need DSM2 in order to be able to dual bind with the 350QX properly.
I don't know what OrangeRx's affiliation with HK is except they appear to be a sole distributor for OrangeRx wares. So perhaps this isn't a knock on HK so much as OrangeRx.
I've also had bad luck with the 5000mah 6s nanotech turnigy batteries. Don't seem to hold up. End up voltage sagging way early in their supposedly useful life compared to my standard turnigies, pulse, and glaciers.