The leather case fits the phone perfectly like a glove and holds the handset firmly in place without compromising easy access to the keyboard ,touchscreen and features.
However the leather must be only microns thick as it is already showing perforations on the flat sides and completely worn away on the corners.
The design and functionality is fine but unless using thick leather which would put the price up, maybe a durable vinyl would be more hard wearing.
I would estimate myself as a light user of the phone, the wear on this case would reflect the use of a "bricklayer" for example.