I’m new to using trackballs, but this device made the switch rather easy. It seems it was designed to make you use two fingers for controlling the 3 buttons and scroll wheel, since the buttons on the right are so small. I miss the fourth and the fifth buttons on my old mouse (which I used for back and forward), but I guess they couldn’t think of where to place them. The software (if you install it) also lets you setup how you want north to be interpreted by the ball.
Pros:
- PC and Mac compatible
- PS/2 or USB
- thumb-operated
- optical (which results in less cleaning)
- scroll wheel
- right side is very similar to regular mice
- software lets you configure how the ball interprets movement
Cons:
- right handed only
- buttons on the right are too small
After using this for about 2 or 3 months I had to quit. My thumb became sore moving the ball around too much. However, I was able to get good enough with maneuvering it to use Photoshop fairly well, but not down to the pixel level, like I can with a mouse.