I've got the card NEN few days ago and they operate in a Transcend TS-RDF1.
My card reaches an average of 20MB / s in read UDN 15MB / s write.
For larger Datien the reading rate is also high at 25 MB / s.
I hope it stays that way for more intensive use.
With my DSLR (Canon EOS 550D) I had from the outset no Probelme, not falter no missing images, everything should be so instructed.
Due to the size I can now finally to have non-stop filming and photographing without regard to whether the memory is full soon.
This card should So who has the good fortune to possess a device supporting the SDXC is anguggen precisely because technically this is good value here absolutely great :)