I just bought and installed 3 sticks. Seems to be working perfectly.
All were new as described, PC recognized all of them. Passed the Vista Hardware rating tool; memory was @ 2GB (1GB stick that's still in it, 2 512 OCZ sticks), and was rated @ a 4.2. Threw in these 3 sticks, pulled out the OCZ sticks, and now rated at a 4.7 with no changes in the BIOS. IIRC, these are very slightly overclocked in my system too.
Easy experience, so I feel confident telling others to buy away. Great price for DDR too!
I'll be selling my OCZ sticks too, but for way more than the price of these 1GB sticks, as they are an overclocker's item.