This seems to be a great MicroSDXC, as I would expect from SanDisk.  I have not tested read/write speed so I cannot comment on that.  I have it installed in my Lenovo ThinkPad 8 to provide extra storage, and it is doing what it is supposed to do.  Guess there is not much more you can say about an SD card.  I would expect it to work just as well in any device that is SDXC compatible.