Summary: I'm a home-based employee for the last 5 years and rely completely on my computer equipment for a living. At the beginning of the year, I purchased a pair of Microsoft Comfort Mouse 6000 (S7J-00010) for my new tower and laptop. Great mice, and they work just fine. But WOW... they had the loudest clicking I've ever experienced.
Summary: I've only had this for about a week but it does what it says it does. It's very quiet - only a dull "thud" sound from the buttons, and I can even almost eliminate that by not pressing too hard on them. The scroll wheel is quiet, too. Time will tell if it remains quiet, but so far, so good.
Summary: This mouse is not "silent" but it is quiet enough for my needs. So far I haven't had any functional problems with the mouse; my only complaint is the material used on the top of the mouse and buttons - while feeling nice - starts to show spots from use rather quickly.
Summary: If you are living in close quarters with someone and do not wish to disturb them (especially if they are a light sleeper), then this mouse is ideal. The annoying clicking noise is nearly inaudible, although the silence does slowly wear off over time. However, I'm six months in and I'm very satisfied with the purchase. The mouse performs great for light gaming and digital artwork, and as far as I judge, only two slight flaws. 1) Silence wears off slowly over time.
Summary: I chose wired because on my extra large fabric mouse pad it really doesn't matter and I dislike depending on batteries when I don't have to. A happy wife makes a happy life. Okay, the thing is, I still feel a slight click sensation but with almost no noise. This mouse is quiet enough for me to game over steampowered late at night without it waking my wife around the corner. I was hoping for no click sensation with no noise whatsoever but this will do nicely.