Mike Hall
I bought this to expand storage in my Samsung Galaxy Reverb.  I was getting 8-10 MB/s transfer speed while transferring MP3s on my commodity SD card reader (Kodak brand, $10-$15 at any supermarket electronics section).  It is worth noting that UHS-1 cards basically revert to class 10 if your hardware isn't UHS-1 compatible.I've been using the card for a month or so and have never had trouble with it - no read errors, no mount errors, no bad sectors.I got mine on a Black Friday sale, so the value was great.  Do some price shopping - if the price is good, you can't go wrong with this if you want a big micro SD card.  As usual, Sandisk is a good way to go.