I have the end of June two Transcend 16GB cards bought and have used it with my Canon 450D in the past 5 weeks in Bali. You have uncomplainingly doing its job. I can save about 1,000 RAW images on a map. The test program c't H2testw reports a write rate of 12 MB / s and a read rate of 18 MB / s. So far, I am completely satisfied. The price-performance ratio.