Pros: Price, look, performance
Cons: Reliability, OC'ing
Things like this happen all the time, but I would have expected it to be a little more sustainable, compared to cheap RAM out there.
OC'ing it is quite hard, you'll struggle to get it to CAS 8, with low voltages.
Long story short, a great bundle of RAM, but don't expect to OC it, and make sure you test it before playing around with anything else on your system.