birkato
The product is OK, but my card does not acheive the rated write speed of 10 MB/sec.  Most applications probably don't need to hit 10 MB/sec, but my GoPro Hero 3 does need the full bandwidth and thus would bomb on me sometimes.  As tested, my card got between 8-10 MB/sec using the larger block sizes.  I complained to Sandisk about it and they allowed me to send it in for a replacement which I did (and took almost 2 weeks), but the replacement behaved the same way.  I would say this card is OK for most applications, but if you need top end speed, I would go with another card.  I bought my card in May 2013 and had it replaced in August 2013 so hopefully they have fixed this problem by now.