It's a sleek, almost timeless design and yet it's also very functional. It is pricey, but well worth it if you're using a mouse all the time. The scroll ring feels a little cheap, but that part is easily cleaned and rectified.

The trackball works perfectly with both windows and linux. It is much easier to use than an ordinary mouse or touchpad. It reduces wrist stress by scrolling at an angle. It also works well with an ergonomic keyboard.

Even with included wrist support sitting at any height my chair allows the stress at the top back of my wrist is evident after a short usage period. The * feel as cheap as they could, inconsistent click among all the * and depending on where you click...  Read More

The bluetooth connectivity is poor. When the mouse is left for a short period of time it loses connectivity and does not wake up until i switch it off and on again using the switch on the underside. Except, this url/ domain/site no longer exists (2015...  Read More

Touch scrolling can only be done by depressing the left mouse button and moving the ball. The scrolling is mad, some apps it scrolls by pages at a time. The drag and drop operation between windows is hit and miss. It really needs a 'wheel' to scroll t...  Read More

In additon i find the scroll system almost unusable and restrictive. Orbiting and panning in sketchup is impossible with this mouse.