Can the negative reviews regarding the speed of the card does not really understand. Does anyone really seriously the promise of 50 MB / s possibly held even for write mode for realistic? The create even not twice as expensive cards. The stated 50 MB / s are probably an absolute ideal value when reading the map. Similarly, the consumption figures the automaker ;-) In my current ASUS laptop you can in SD card slot with 15 MB / s read and write 40MB / sec. All the as reported in part, Write 8MB / s or less, should perhaps draw in times whereas not the card by its poor transfer rates is to blame. But more important is the durability and therefore data security. Had previously faster but also much more expensive card from SanDisk. After only 3 months my Tablet has reported more frequently: SD card away! After 6 months, she was completely broken. When important data ........ many thanks too! Since 10-year warranty and free replacement of no avail. So I think, at 25 for 64 GB is here a great price / performance ratio at this time! Anyone who buys a Golf, expects something solid and everyday compatible and non performance of a Koenigsegg Agera R :-)))