Summary: The previous (Dell) mouse I was using on my Windows XP Pro PC would not allow Microsoft's "Intellipoint" software to configure the wheel-click option. Instead, I had gotten got a message that said you must be using a Microsoft brand mouse for this configuration to be applied. So I looked at Amazon to see what optical mouses (By the way, I once was told that if it's a computer mouse, not a biological one, that the plural was mouses, not mice.
Summary: Note the "styles may vary" disclaimer! I ordered this assuming it would be an original Wheel Mouse Optical (as pictured), to replace the worn-out one I've been using for years and with which I've been very happy. What I received was a new-style Microsoft 3EG-00003 Ready Mouse - Black , which has the same functions but is different enough to leave me disappointed.
Excerpt: Does what it is supposed to do. Too light and too little. If you want a incredibly tiny, light mouse, this is for you. If you want a bit much more substance, decide on the older MS model with the red light in the rear.
Summary: Having used the basic optical MS mouse before I was happy with it. This one is smaller in size (meaning your hand is much bigger than the mouse and falls around it), feels cheap (light plastic which feels empty inside), and the mouse-click noise is much stronger than the old basic MS optical mouse. Before you could not hear the clicking sound so much. Now you can definitely hear it and if you're on the phone the other person can also hear you clearly clicking.