Sorry people... the more I read, the more confusing I got.
These questions pop out in my mind:
1.Why many of you buy oversea ETF? Don't buy Malaysia ETF?
2. I thought buying ETF would be easy. EG, opening an investing account in one of the banks in Malaysia. then do a RSP. (At least this is what I did in Singapore, I buy Singapore ETF and would recommend my family to buy ETF, too. But then after reading this thread, it seems different )

I see.. it makes more sense now. Thanks!