Pros below:
Beautiful, comfortable, ergonomic, comfortable to hold in a larger hand.
Got cons:
Scroll, for 2 weeks of use in free mode, it began to overwrite, there is a characteristic rattle when used.
Its pros:
highlighting, fits comfortably in the hand, five speed switching modes.
With its cons.
in the video scrolling mode, it sometimes works without touching, you switch the mode and everything is fine