I have recently purchased this case for my kindle.
This case grips the kindle perfectly; I have had no issues with 'weak magnets' and the kindle slipping or falling out of the case. It covers the kindle perfectly so there are no exposed edges, which is great for a clumsy person like me! The buttons on the back work seamlessly.
The Origami side of it works very well, I can use it happily after reviewing the diagram instructions, and it took me all of 30 seconds to get to grips with it. I think it's great I you use it to view in both portrait and landscape.
I also love the fact when closed it puts the kindle on standby - handy feature. I would recommend this for anyone wanting a decent robust cover, really nice colours too. I went into waterstones to have a look at them, they are true to picture, it also gives you the opportunity to feel them and check the weight.
Overall a great product, designed to fit perfectly with your kindle. Yes it's pricey, but its excellent quality and you get what you pay for. I expect this to last a long, long time.