The card is fast. I don't have any benchmark software to measure the speed, but in my ENV Touch cell phone it stores and accesses photos and mp3 music files much faster than my previous card, which was an 8Gig class 4 Kingston microSDHC card I was very happy with, other than I wanted a bigger card to store more music on the phone.



Again, I don't have any benchmark software, but comparing the read/write times to my previous class 4 card, you can see and tell a difference in read/write speed.



I read several mixed reviews on the Transcend card, but figured that for the price, it was worth the chance. Besides, Amazon has a very consumer friendly return policy. I've had the card for several weeks and have uploaded & downloaded music to and from the card several times now, without any problems whatsoever. I will report back and update this review if the card suffers any mishaps, over time.



Usable storage on the card is in the mid-14 gigabyte range after I formatted the card in my cell phone.



I'm not sure if formatting in different devices for different purposes will yield variations in usable space, but I knew when I bought the card, you never get the full published storage space of the card. The mid-14Gig range seems about right since my previous 8Gig card offered up a little over 7Gigs usable space after formatting. I was not disappointed with mid-14Gig usable storage as other reviewers have indicated they were surprised after formatting they had less than 16Gigs of space available.



Packaging was minimal, which I actually appreciated. There were no hard plastic blister packs to struggle with, or risk life and limb trying to open. It came in a neatly sealed heavyweight envelop. The included plastic storage case is more than enough to protect the card.



Let me sidebar from this review a little, since its related and relevant.



I originally bought a slower 16Gig Class 2 SanDisk microSDHC card on Amazon about 3 months ago, to replace the class 4 8Gig Kingston microSDHC card I had. I figured I would sacrifice speed for capacity to keep the cost in check. The card works fine and can't report anything directly negative about the card, but being class 2, it was noticeably slower than my class 4. Another, more significant issue, however, was that I was getting nothing but read errors with the class 2 SanDisk card in my ENV Touch cell phone. So, all in all, this was a mission failure.



I suppose I could have returned the card to Amazon.com, but felt it really wasn't the card's fault, and more to do with both the slower speed combined with the larger capacity that may have lead to longer read times than the phone was patient enough to handle. In addition, the class 2 SanDisk works fine in my daughter's ENV3 phone so I gave it to her to use. Not sure why it worked just fine in one phone, but not the other, other than my speculative hypothesis, above.



All-in-all, so far I am very happy with the Transcend 16Gig Class 6 microSDHC card I purchased on Amazon.com and would recommend this card.