It's small but smart, working very well on my Thinkpad.
I'm using it right now, very good quality.
When I received the other product and tried it, I immediately this model is superior, since I don't need a mouse pad for it to work perfectly on my white colored tabletop, while the Lenovo 06P4069 Optical USB Wheel Mouse needs a mouse pad to work.
Typical cheap mouse, it works but the design isn't great.
Its an okay mouse.
That became such a nuisance that I replaced it with a wireless mouse.
Sometimes I click the right button but it does not respond, especially when I click fast.
Mouse wheel stopped working after a three-week light usage (less than 0.5 hour per day .
As a fan of the X1 Carbon, I thought this mouse would be a nice addition.