This is my second of these supposedly sure-footed Samsung SDHC cards, dismal with 16GB capacity. With the first I had no failures in outdoor use, even if I (still) am it rumgestiegen; It is ideal for my waterproof Pentax compact camera and on trips where I need have no more fear of moisture and shocks. Now I have purchased the 16er for our new Bridge cam to take pictures and HD movies and it runs without any lag. On my i7 notebook with Win7 I scored in Test good 10MB / s write speed for files> 3MB. So a robust map should be, it is me fast enough.