While I got this card as a "deal of the day" on Amazon, I would gladly pay $79.99 for it!With that said, there has been some skepticism related to the serial number of the card as it is displayed on Amazon. I can confirm that I received a brand new 64 Gb card with the serial SDSDQUA-064G-U46A. The packaging of the card says that it is a Class 10 / UHS Speed Class 1. After formatting / copying over 20 Gb of data from my Evo 3D's previous card, I get write speeds of about 9 Mb/s and read speeds of about 20 Mb/s. I am fine with this, and can not complain because I don't believe the Evo 3D is intended to be compatible with SDXC cards, however it does work just fine.