This mouse is a pain to use:1. As stated by numerous users, the middle click is quite difficult to use because of some strange delay time.2. The left click is simply way too stiff, it's terrible for any kind of gaming. I have to click 3-4 times sometimes to get the click to register, pounding my fingers. Trying to use it with my right hand (I'm left handed) does not help - it's quite impossible. The right click seems fine, however. Odd.3. After using this product for several days I've begun to feel slight aches in my hand joints. I've never had a problem with a mouse before.It's quite a shame, since it seems like an okay product, but simply has too many flaws for it to be useable. I would not recommend it to anyone and if I could, I would return it.