Summary: Had mouse for just over a year, not used daily or anything and it died. It started to assume everything I clicked on was a double click or that I was not holding down the left button after less then a second. I will not be buying this mouse again.
Summary: This was the worse purchase I've ever made on Amazon. The mouse left click did not work properly. The mouse did not come with any drivers in the package so I couldn't program the extra buttons and I could not find the proper drivers on Zalman's website to install to try to fix it or program any of the buttons. I should have just stuck with a Logitech mouse.
Excerpt: I was looking for a nice decent quality mouse with adjustable DPI which is what I got. HoweverI hate the button location for the adjustment and the multi fire button placement. It's just in the way and I'm forever accidentally bumping these controls which becomes a PITA. If your hands are small this mouse might work well for you. It actually feels well built and pretty comfortable but with the button location becomes more trouble than it's worth for me.
Summary: I use this mouse on my gaming rig and have to say I am very happy with it. I play a wide range of games from Battlefield 4, to DOTA 2, and Starcraft II. Movement is smooth and all of the buttons work well. I have never used the auto fire button and frankly I'm not quite sure what it is for. I took a star off because I wish the buttons could be customized like you can with competitor mice.