I am not familiar with these cards, but after doing some searching and reading test reports and buyer reviews, I decided to give them a try. They are much faster than most in the same price range and test very consistently. Batches of 10 test within about 1 MB/s of one another. Very few failure reports in buyer reviews. All sizes are priced very competitively for the speed they are rated at. Apparently they have been around for some time, just not as well advertised as some others. Link