Bests & Worsts Reviews from Amazon

*** AMAZON / Please verify the source where you get the cards from! Some of them are duds and will provide a "Card Full" error! *** After reading all the rave reviews of this card and seeing it being on sale, I decided on giving the PNY 64GB Elite Performance UHS-I 90MB/s card a try. It worked great for a day giving the speeds that most people talked about (60MB/s roughly when writing). Then as I was shooting a real event (I'm a professional photo/videographer) on a trip in Mexico, I got a "Card Full" error, even though the card was only 10% full. It crashed my camera. I tried to read the card on my computer, and couldn't access any data. Now I have to go to a Data Recovery place and pay $150 to retrieve the lost photos. (9/17 update : I have permanently lost my data, Data Recovery place could not recuperate the lost data :(...) Buy this card at your own risk as some of them might be "knock-off" cards... If you shoot things that are not important and not professionally, then it's fine. I have owned dozens of SD cards in the past, from all brands, from Transcend to Sandisk to Kingston to Panasonic, in all kinds of flavors. This is the first time ever I've had an SD card fail on me after Day 2. I would say stick to the Transcend / Sandisk / Panasonic / Kingston cards if your work is important...