Personally, I like also very pleased that there is a small increase of the power button provides around - on the one hand the power switch is protected and on the other hand, the device switches itself so no one accidentally when it is transported in a trouser pocket.
The hard shell is made of slightly brushed polycarbonate that makes the mobile grip considerably.
The Z1 has fallen to me from about 1 meter in front of weeks unintentionally on stone floor - two small lateral cracks in the case, the mobile phone has God "survived" Thanks ....
We are therefore also so confident in the Krusell that we have a second ordered in blue for an employee.
Best regards - Michael