I bought this memory card the day I received my Samsung Galaxy S4. It arrived in two days via Prime, plugged it in and formatted. It offers 59.45 GBs of usable space. Being that the card is Class 10, reads are super fast and writes are great. UHS-1 is, sadly, mostly only supported by DSLRs, so most smartphones and devices won't take advantage of the super, super speed, but nonetheless, the card is fast.This card has lots of storage, affordable, transfers and reads fast. I'd recommend this for people who carry a lot of media, such as music and videos.