No need insurance, better if the product you are buying have 7 days no reason return.

As long as it has local return, you can apply for return if there's any issue then you can set a date for Ninjavan to come pickup at your house. Normally they come a day after the set date 

All you have to do is pack the item and write the return tracking number on the outside, you can even place it on top of your gate pillar so they can just grab it themselves if you won't be home.

You would be refunded as soon as they check the parcel content once it reaches the Malaysia warehouse, they would even give you back the SST you paid.

If they are broken or damaged, the seller might just let you keep the item and refund u the money without asking you to ship the item back.