It seems the cover is the actual housing incorporating the slave cylinder along with the piston which pushes the clutch shaft directly like the bucking bar normally would. So by rights, the conversion is a simple 'bolt-on' type and if I'm correct, bleeding would be done at the top, where the clutch arm would normally be....
Looking at it....I like it - the whole concept follows the 'K.I.S.S' approach as there is very little that can go wrong.
The only thing that I can see potentially going wrong is the seal of the slave cylinder failing AND that is a common weak link in almost any hydraulic setup anyways, so as long as the entire system is sealed correctly with good quality parts, then it should be a fool-proof conversion from the traditional cable actuated setup.