I have Crucial memory in 2 Macs now, have not experienced a failure. Yes, OWC has a lifetime warranty and having to replace 2 out of 8 chips at a time did not cause a downtime. But it was a PITA.
I have bought 3 items from OWC in the last few years that failed, a 3GB Sata PCi card, a 12 month warranty HD enclosure that failed at 13 months and 6 memory chips. Plus the firewire 800 dual 3.5 raid box I got from them 2 years ago was 10 times noisier then my Mac fans, and their specs said it was quiet. As a long time, 10 year plus, customer of OWC, I am just saying their quality seems to have slipped a bit and I now shop based on product durability and reputation, not just a low price.