Thanks! I got several packs this Christmas, actually. I love them. I actually did try them with my pimped Karador deck (still a work in progress) for a while. I figured the shuffle feel of double matte sleeves would outweigh how my cards look. I swapped back to standard Hyper Mats recently, and I do admit that my cards look much nicer in those, and the shuffle feel isn't that much worse. But the premiums were definitely a good purchase for me, so I'm going to keep looking out for them.
Also, as an EDH player, the fact they come in packs of 50 is nice. Some of the sleeve backs can be a tad warped, though.