Used on my Galaxy Tab2, this card fully meets my expectations. ATTO benchmark test gave me 18MB / s read and 13MB / s write, which is quite reasonable. It is hoped that the tablets can adapt to the UHS-1 standard to go upmarket because the greater the capacity plus speed will improve. In short, fast, reliable, the fact of having an SD adapter is quite appreciable. The best quality / price. Transcend is a trusted brand and offers lifetime warranty, it is not negligible.