Immediately sent ahead: the shell performs its function fully, protects the Wintab, is to transform with a handle in a stand for the tablet and has a good keyboard, roughly comparable to a netbook keyboard. But: as displayed correctly in the descriptions that Case has a mouse pad, no mouse buttons. In practice, this does not mean that the left mouse button can be emulated by double-tapping, the right mouse button, that is only possible on touchscreen from Tablet. Drag & Drop and some other functions such as SHIFT-mouse button therefore not function.
Conclusion: The Case looks good, protects and provides plenty of writers a good keyboard. The mousepad is unfortunately only limited usefulness.