Having already the Transcend Class 10 not 10 corresponded to class, I wanted to test this card. Again came H2testw used on 2 computers I have performed the test. The map came to a maximum of 5.2-5.5 MB / s in write mode, read were about 7 MB (s it. Clearly too slow. My reflex can thus simply not make continuous shooting fast enough, thus the card is again back. a stale aftertaste remains, really not the minimum specification, all class 10 cards in this price segment fulfilled for all doubters: my old 4GB High Speed Card creates its specified writing + reading speed quite loose at the same two card readers!