Ergoguys PC-Trac Ergonomic Trackball Mouse

While some people may prefer having a mouse that dwarves their hand, I found this trackball mouse to be difficult and uncomfortable to use, and would not recommend it to anyone unless they prefer having a very large hand rest. The hardware is also...

Very comfortable and smooth. The adaptive gain feature works really well. If you roll the ball quickly, it decreases the resolution, resulting in faster movement. If you roll the ball slowly, it increases the resolution for detail work. I use this...