practical and (very) small
ideal for travelling as it is very small, and works without a mat on a dark or light surface. However, its size makes it not very ergonomic for intensive use (big hands will suffer!).
The click and knobs are pleasant (the knob is moderately noisy).
A doubt on its compatibility with the Unifying system of Logitech (only one dongle for several devices), not succeeded in making it work and the usb key does not carry the Unifying logo hence the limited note to 8