The display is well protected by the hard cover, is available in the front from the inside even slight indentations for the keys, so no is pressed accidentally from them by external pressure. The cover fits easily magnetically the reader, so that the sides can not open spontaneously.
The reader is hooked into a kind of plastic device. This I consider to be sufficiently stable, even if it looks rather delicate. Through this Einhaktechnik the reader comes fully into its design to bear because it is framed around them by no leather straps or the like.
Whether or not there is the cover to be made of leather, is not relevant to me. On the contrary, as an animal lover I even shun the use of leather where it is at all possible. The cover is very well made and is very durable.
Therefore, there's me - despite the high price and because I know that Sony on this accessory once again wants to make right - full 5 stars.