Cons: Possibly the worst card I've ever owned. Over the last month all three of the cards that I purchased separated at the seams causing the write protect tab to be lost making the cards useless. I have several older low dollar cards and none of them are of such poor build quality. Stay away from these. You'll be sorry if you don't.
Summary: The batch of plastic used to manufacturer this card is defective. It literally disintegrates in your hands.
Cons: Cheap manufacturing and materials. When I first opened this, the two sections weren't sealed fully and partially coming apart. I needed a card right then so I used it. It then started coming apart near the pins and left a plastic piece in my laptop card reader causing a larger issue.
Pros: Considering the sale price, this is a terrific value. Speed measurements were done with an internal PCI-E connected SD reader. Also tested with a USB SD reader which produced 10% slower results so keep that in mind when comparing numbers.