OWC are great at warrant claim. No questions ask when you need replacement, the only problem with oversea purchase is OWC doesn't pay for oversea shipping, even on failed devices. in US, i have 4-5 sticks of OWC failed on me for my MacPro and they always fulfil the claim. It's lifetime warranty! Their stuffs can get a little pricy but their service is top notch.

That's right. In US, OWC is top choice for enthusiast because it's cheaper and stellar customer service. it has always been my place to go if i need anything on Mac. In Malaysia, one may have to consider shipping cost and warranty claim. Unless it's a big difference in price that warrant it, i would just go with Apple. Shipping cost and Custom are straight up hassle. Having says that, could be wrong, i don't think Apple offer lifetime warranty on sticks, so OWC has the advantage here when it comes to longevity.