Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Bought 2 separated by 8 months, the 1st was DOA, the 2nd failed after 6 months

I've had two Transcend 16GB Class 6 SDHC cards fail on me now. The first one was DOA (purchased in Dec 2008)--neither my Canon HF100 HD camcorder or Canon TX1 hybrid digicam/HDcamcorder could write to it. The second one (purchased early 2009) failed after 6 months of semi-reguar use in my Canon SX200. I gave the brand two chances. If I myself happened upon two bad cards, I either have terrible luck or the failures are pretty prevalent out there.