"crazy fast"

Love it, use it to store videos and photos on a Galaxy S3. Good stuff no problems yet like with my bootleg Transcend card.

"Does the job as advertised"

I use this on my 32 GB Microsoft Surface RT and it does the job as advertised, so 5 stars.I have used it to extend the storage capacity on the tablet to 64GB for storing documents, pictures etc. There are many articles on the internet that show you how to do that.