The RAM in itself is fine, no real issues. The problem was getting it to work on my system. An older XPS 730 that supposedly can support up to 2x4GB of DDR3 at 1033 or 1333 came to be a bit of a pain. Initial installs of the RAM caused a C1 (Base Memory Detect) issue, which were sorted by pulling the dimms out and trying again.
It's nice to have a full 8GB of RAM and Corsair is certainly a trustworthy company.