Most tablets and mobile phones can be used where an SDXC card will need to write to the card no huge write speeds. Therefore, this card especially for data storage on your phone / tablet is well suited. The argument that you can read quickly from the card is not really useful, because it only applies if you remove the card from the mobile phone to read. In mobile, the read speed is usually limited by the phone itself.
Actually, the card would have 5 star worthy (64Gb for 25 is really cheap). But I find the title very misleading advertising and for the customer anything but beneficial.
"64GB micro SDXC C10 SaveTec U1 UHS-1 to 50MB / s"
This headline suggests that with 50Mb / s can be read or written, which is far away from reality. The card reads with approximately 30Mb / s and writes about 20-25Mb / s. Since even in the description of any other values are given, I find the 50Mb / s (what ever they relate -?!? Read / Write) misleading.