There's a thread over at Kindle Boards about this. M-Edge has a presence there and have stated that they will not be using the Amazon connection system and are committed to the corner strap system. People are also upset that some products used to be leather and now they're artificial leather but still cost 50% more than the Amazon cover.
The KBers are also upset at the color choices, particularly the elimination of some of the brighter covers on the Latitude Jacket which are still made for the nook. There's quite a backlash with some people who have as many as four M-Edge covers saying that they won't be buying M-Edge for their K3.
M-Edge actually asked for feedback a month ago but apparently didn't incorporate any of the suggestions. They still make the Latitude Jacket in my choice of color, but my wife is disappointed.