Darby
Product: SanDisk Ultra 64 GB microSDXC Class 10 UHS-1 Memory Card 30MB/s with Adapter SDSDQU-064G-AFFP-ARating: 5/5 (Excellent)People buy MicroSD cards with 4 primary criteria in mind: (1) Storage Capacity, (2) Price, (3) Reliability/Compatibility/Availability, and (4) Speed.  When I bought the u64 back in Feb 2013 (not long after its release) it was the largest and fastest MicroSD available at the time, and it weighed in at a good price and backed up by SanDisk reputation.For me, and my Galaxy S3 {SCH-i535, currently with Android 4.3} this card has been a delightful slam dunk on all four counts.  I was reminded of this today when I slammed 30+gb of MP3's from my PC onto my S3's card.  The card handled the massive data dump with grace and aplomb, and I'm now able to use my phone to wirelessly stream my entire music library to my new bluetooth-compatible bookshelf stereo.Color me very satisfied.