book came on time, in "good" condition, but slightly warped and pages were yellowed, which I can't understand b/c it is not even one year old. otherwise, I recommend this dealer

Let me start off by just saying this is an amazing mouse for FPS and general use (though the price-tag can't justify buying this mouse strictly for the office). Wireless mice are notorious for being inaccurate due to Wi-Fi interference. They are also known to have a slower response time compared to wired mice. Neither of these concerns apply to the G900. I have used it for over two months now and I have never had any problems. If you do a little research, there are charts and diagrams showing the results for interference and response testing comparing different wired and wireless gaming mice. The G900 absolutely trumps all of them. (I will post the comparisons when I have some more time)