Pros: - Good weight and table-grip keeps unit in place - Adjustable grip angles great for fatigue -Rechargeable, internal battery -Accurate ball tracking

Cons: -DPI switch is easy to press acccidentally

Overall Review: Having gone through several trackballs as well as vertically-oriented mice, this is probably the best version of either that I've encountered so far. Is as convenient as the more popular Logi MX trackball with the added flexibility of its adjustable angle. Highly recommend for anyone that likes trackballs and/or vertically-oriented peripherals.