Very good value. DPI settings are configurable via the software and a button below. The quality of workmanship corresponds to the price. I had to charge several times a week with continuous use of 3-6 hours a day. Not great not terrible, I would estimate around 16-20 hours to red light on average. If you've used Logitech mice before, the profile will be familiar, with a slightly relaxed feel. The weight savings are worth the reduction in battery life, as 6 hours of operation without an additional battery is a welcome and noticeable contrast.