Bests & Worsts Reviews from Amazon

Prior to the purchase of this item ("Kingston 16 GB Class-10 SDHC card"), I have bought several other Kingston memory cards, including the Kingston 16 GB Class 4 SDHC and Kingston 8 GB Class 4 microSDHC Card. They were all reasonably priced, and performed up to specifications. So I never had a problem with Kingston - until this time. I benchmarked the Kingston SD10G2 card upon its arrival. The result I got was so appalling that I have to re-run the tests on two different computers to confirmed it: This so-called 'Class-10' card is actually much slower than any of the 'class-4' SDHC card I have ever tested before! - When writing small files of 1MB each, the speed of this card is painfully slow at just 0.8MB/s - When writing larger files of 5MB each, the speed increased to 4.9MB/s (see the screen capture I uploaded to Customer Images section for details) - Only when writing a huge file of 1GB size, the speed finally reached 10.7MB/s. In contrast, the Transcend 16GB TS16GSDHC10 (which is also classified as 'class-10') delivered 9.9MB/s when writing 1MB files, and 12.8MB/s for 5MB files. In fact, even my previous Kingston 16GB class-4 card gave much better results of 3.7 and 8.0MB/s, respective. In order for a SDHC card to be marketed as 'class-10', it must have a sequential read/write speed of at least 10 Mega Byte per second. This Kingston card barely meets the requirement under the most optimal test condition. However, when used in a digital camera (either point-and-shoot or SLR), this so-called 'class-10' card actually performs much wosre than a typical class-4 card. As of this writing, you can buy other cards (such as the HP 16 GB Class 4 SDHC) for less but get better overall performance than this Kingston card. Also as a matter of principle, I refuse to support any company engaging in this kind of deceptive marketing techniques. This card is going back for a refund, and I will be leery of other Kingston products from now on. [Update on Aug 8, 2011] A Kingston representive contacted me concerning my problem with the write speed. However, I have already returned this Kingston card and purchased a PNY 16 GB Class 10 SDHC Card P-SDHC16G10-EF. The PNY card gave me a solid class-10 performance. See my Amazon review on it for details. http://www.amazon.com/review/R3HY4QHXNJTEWP/