I was going to pick up one of those cases but I really disliked the unfinished edges. So in the end I had to go with the official case since it is the only other one I could find that uses magnets.
Just an FYI if you are in the US and really want the official one you can get one at retail on Best Buy online.
Here in the Charcoal and
Here in the Sandstone. They are sold out of the Indigo.
It makes an ok stand but I like the fold because it makes it easier to open. Almost like opening a book. The only flaw I can see is if you press on the left side of the Kindle it can pop the case loose but other than that I can hang it by the case and shake it pretty good and it will not come off. I use a skin on the back too if that makes a difference.
From the photos of the Ayotu case it would have the same issue of popping by pressing against the edge of the Kindle.
I think Amazon could solve the problems with a slightly stronger magnet and recessing the back off the edge a few mm so it cannot be easily pressed against.