Pros: Rock solid in my MSI G41M-E43 motherboard with a Core 2 Quad Q8400 CPU.

Cons: None. It's been perfect from day one.

Overall Review: I originally bought a Patriot G Series ‘Sector 5’ Edition 4GB (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 1333 (PC3 10666) Desktop Memory Model PGV34G1333ELK for $20. Even running at 1066 it would blue screen before I could even get Windows installed - this happened several times. Even after I finally got Windows installed, the machine never lasted more than about 45 minutes before I'd get the BSOD. I hoped it was just the RAM and not the brand new motherboard or my existing Quad CPU. Fortunately, once I replaced the Patroit RAM with this Kingston set for only $25, the machine has been perfect. I'm going on the third month now and this machine has never had a single problem, no crashes, no BSOD, nothing - and this machine is on 24/7/365. It's running at 7-7-7-21 perfectly. Excellent value. Highly recommended.