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I bought the OWC RAM for my MacBook a year ago and it's been great. I've never heard of Mushkin, so I can't help there.
 
Another commonly-recommended place is DMS:

http://www.datamemorysystems.com/_memory-information/4GB_Kit_DDR2667_SODIMMs_190x2.asp

...whose prices are usually nearly identical to OWC, and they also offer guaranteed-to-work-in-a-specific-Mac RAM and a lifetime warranty. Been using DMS for over a decade at work, and the two times I had memory fail they were quick and easy with a replacement. (Interesting aside: When you call DMS support, somebody picks up the phone. As in, no phone tree or automated system at all--that's always a pleasant surprise.)

That said, I'd get the OWC stuff. I switched to them at home a couple years back, for the combination of their very good green business practices combined with decent prices, good quality, and lifetime warranty (which means something because they've been around for a long time).

Not saying G.Skill is bad or anything, just that I'm willing to spend ~10-20% extra for peace of mind and a company I like very much.
 
Another commonly-recommended place is DMS:

http://www.datamemorysystems.com/_memory-information/4GB_Kit_DDR2667_SODIMMs_190x2.asp

...whose prices are usually nearly identical to OWC, and they also offer guaranteed-to-work-in-a-specific-Mac RAM and a lifetime warranty. Been using DMS for over a decade at work, and the two times I had memory fail they were quick and easy with a replacement. (Interesting aside: When you call DMS support, somebody picks up the phone. As in, no phone tree or automated system at all--that's always a pleasant surprise.)

That said, I'd get the OWC stuff. I switched to them at home a couple years back, for the combination of their very good green business practices combined with decent prices, good quality, and lifetime warranty (which means something because they've been around for a long time).

Not saying G.Skill is bad or anything, just that I'm willing to spend ~10-20% extra for peace of mind and a company I like very much.

Fair enough. I had a stick of OWC ram go bad about 6 months ago and they replaced it, no questions asked. Only stick I've ever bought that's gone bad.
 
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