After 10 years of went my "old" Logitech Mouse retire. Because of posiviten reviews I had taken the Anywhere Mouse MX and the M705 shortlisted. After I ordered both models and compared, I landed at the M705. The Anywhere MX is for my needs (only desktop use) in the long run simply too small. I do not have all too large hands, but the M705 is larger and is better in the hand. The Anyhwere MX is not a bad mouse with security, but would prefer more for mobile use with a notebook. The M705 is against almost like a flatterer in his hand. She has a good size, dominated all important basic functions and provides the quality that I'm so far come to expect from Logitech. The buttons can be reprogrammed easily through the included software. Absolutely super I find the Unifying receiver. Had the Logitech K800 Wireless Illuminated Keyboard purchased and can now operate without problems both devices via a receiver. Just plug the device, install software and connect both devices via the receiver. As regards the duration of the batteries I can not say much. After 2 weeks in operation (4-5 hours daily), the "predicted" residual maturity even at 657 days. Curious whether it is true. Should the half be achieved, I'm still happy ;-)