Summary: I am on my third mouse. the Lasers are either not powerful enough or poor qualuity. They need to be physically cleaned about every 15 minutes of use with a Q-Tip or the response becomes very slow and eventually after 30 minutes or so non responsive. The cursor movement out of the box or within about a week becomes 'jittery.
Summary: Logitech was kind enough to send me another mouse of the same model as a replacement, but the replacement died (not response at all in any USB port on any computer) in less than a month. I just got off the phone with Logitech and then are forwarding instructions on how to get a refund (they offered another replacement, but I gracefully declined). I like the design, but apparently the quality is lacking.
Summary: This is a great mouse, with one major problem: the middle click. The mouse wheel requires too much force to register a click, a specific angle from which you must push it down, and often makes the click sound without registering the actual click. For me, it takes an average of 3 middle clicks for it to actually register. I got a replacement which had the same problem, leaving me to conclude that this is a design flaw of this model.
Excerpt: Was going to replace my Logitech G5 with this mouse because of the scroll wheel that was advertised to preform really well. It only took a few minutes to realize how poor this mouse felt compared to my G5. The buttons especially felt very cheap and while the scroll wheel was easier to scroll, it still didn't feel solid. The mouse also doesn't move as smoothly on a mouse pad as my G5.
Summary: Am I the only right-handed person who uses a mouse with the left hand? This is a very good mouse but I wish they made a abidextrous version. Using it with my right hand was uncomfortable after awhile and trying to use left hand can become painful. I love the long cord, and the features are awsome. The programmable scroll wheel is smooth as butter but this is not a comfortable mouse for me after using it awhile. So I am shopping for a replacement.
Summary: Well first the pros: -its nice right handed mouse, -feet quite nice in the hand, -have nice light scroll, and now the const: - very bad for the gamers! has very low polling rate THAT CANT BE CHANGED!!!!
Summary: The clicking is very hard. My right finger starts to hurt after about an hour. I'm going to return it to best buy. Pointer seems to overrun target. Hard to drag across surface.Poor click and too loud.
Summary: The mouse has a Forward and backwards button on the left-side. It's VERY easy to click on them while surfing and cause your web page to either go to the previous page or forward! It's very annoying.