I just want to give the team at LuckyModel a big Thank You. 
I just received a shipment of paint from LM. Last night, on closer inspection, I found that the cap on one of the jars (Gunze) was quite badly cracked, though it wasn't leaking.
So I logged onto LM and lodged an enquiry, telling them what I had found and that although the jar wasn't leaking, it could not be closed tightly, and asked if they would consider replacing the jar.
Seeing that it was a Friday night, I wasn't expecting a response until at least Monday. However, earlier this evening, I found that I had received a reply from Jan at LM, issued this morning (Sat. 31 July) at 11:13AM (Hong Kong time) letting me know that she would arrange for a replacement jar to be sent. And indeed, my account details show this as having been shipped today
Outstanding...
It may just have been a jar of paint, but this is the sort of service which keeps me coming back.
Once again, thank you to Jan and the rest of the team at LM.