I only ever had 2 OCZ items - a 500w StealthXtream PSU, and the heatsink I'm using right now.
The PSU rocker switch broke, but the PSU I had (and from the review I read when I got it) was always performed well/quietly.
As for the heatsink, well for a 92mm direct touch cooler it keeps my CPU very cool at 1.4v - 30c idle, and 42c max under 20 rounds of Intel Burn test. So they must be doing more than one thing correctly unless it's down to my case cooling.
Never touched their memory due to some iffy things I'd read in some reviews.