Just wanna share my experience.
I used HSG when they first launched with the promotion of free 1st 2kg.
Bought Lego from Amazon and according to the shipping volume -it's around 4 pounds. I was so happy I thought my shipping from US-Malaysia would be FOC. Ground shipping was free at that time.

Guess how much was the volumetric weight charged by HSG? 9kg which is close to 20 pounds!
HSG said they cant repack for me. Tried to return it back to Amazon but HSG will charge me 20 pounds domestic shipping weight too. So I was left with no choice but to ship to Malaysia. A very expensive Lego set

When I received the item, it was indeed a very big box, about twice the size of the item but I think it can be repacked in a smaller box. How do you guys ensure that the merchant do not use a very large box when shipping??

Anyway, aside from that, the service from HSG is good.