I have the card on my EeePC 1000H benchmarked with the adapter from the Lieferumfang.Benutzt I have the program ATTO. For comparison, I have a 4GB Micro SDHC Class 2 card
8GB class 6 card: max read: 19.7 MB / s max write: 17MB / s
4GB Class 2 card: max read: 19.8 MB / s max write: 8MB / s
Both cards reached almost their maximum over conference rate of 64 KB blocks.
One point deduction for there not increased reading rate compared to the slower cards and plastic USB-> microSDHC adapter. The is no very strong impression