In principle, not a bad mouse for the price (fits comfortably in your hand, is precise), but: - Battery life: catastrophic (I switched to Eneloop batteries, so it is not at least as expensive / harmful to the environment) - Massive connection problems with my Thinkpad T510 with Windows 7 Pro (64-bit): If it works, everything is great, but several times a day the connection is lost. Then only helps remove the Bluetooth device, battery out and log on again. - Now (about 1 year in occasional = max 5x / month usage) is broken (by the constant battery change) even the cover of the battery compartment
Conclusion: not even as a second mouse on the go (for that I had bought it) is recommended.
