I've got SDHC cards from other well-known brands, like Kingston and Transcend, and this class 10 version from PNY (in their "professional" range) is their equal, if not better. Read and write speeds have been excellent throughout and it copes very well with continuous shot mode with my Nikon SLR. The card seems reliable too, with no data loss.
The only negatives I can remark on are that there is no case with this card - not even a little plastic clipped case - and there is a stupid statement on the front which says "Packaging contains up to 70% less plastic". Let's think about that: first of all the words "up to". That could mean there's only ONE percent less plastic. Second, "up to 70% less plastic" compared to what? I've looked all over the packaging and there is nowhere that states what the "up to" 70% reduction is supposedly measured against. "Up to" 70% less plastic than a dishwasher? Than a wheelie bin? Than another card in the PNY range? Who knows? The statement is utterly meaningless and misleading - it's on there in an attempt to trumpet some green credentials but if you think about it for two seconds, it doesn't tell you anything at all. Very poor marketing.