not worth it mate, u have to unlock it using gevey sim n u cant update ur ios all time since it will lock back ur phone..just buy the local set mate, local set is free sim/official unlocked version which can be use with any sim card around the world.. the price different only rm100 mate but its worth it...seriously its worth...besides the price for the local sets is higher than the us set if u want to sell it later.. 

seriously dude, although its a good offer u need to think the advantage of it, ifuse local set u dont need to think anything about the sim lock..and can update to latest ios version without hesitation..if using us set u need to think about gevey sim n the way to claim warranty if the phone problem..if local set, just sent to maxis,digi,celcom centre to claim warranty.if us set got problem u need to go to singapore to claim warranty since apple malaysia not provide warranty claim services for iphone...nearest apple store that accept it is singapore...so think of it mate...