I received this mouse way in advance of the estimated delivery date. It has a nice and comfortable to hold design. The mouse features convenient forward and back buttons near the thumb, but not in a position that gets accidentally clicked. The silent left and right buttons are a great feature too. The mouse goes into standby after a few minutes of inactivity and fires back up as soon as you click a button. It hasn't missed a beat doing this so far. One concern I had before buying was that it'd always be lit up, but you can use the mouse with the LED activated or deactivated. Turns out I prefer the LED left on anyway.
I'm so impressed with this mouse I've just bought the red LED version to use at work. I'm fed up with the creaky wired mouse they provided me and the trackpads are useless on our work laptops. For a shade over 20 bucks delivered I think this is a solid investment for something I use >8 hours a day, 5 days a week!