At one time, I used bargain quality cards because they stored my images just as well as the more expensive high-quality cards.
However, after I lost a few images due to card failure, I decided to use only high quality cards. I now use SanDisk, Lexar, and Toshiba.
I routinely use cards with average write speed. However, when I am shooting video, I use cards with a faster write speed.
, on Flickr