Bests & Worsts Reviews from Amazon

I now own 3 different models of the G900 series of mice: The original G900, the G903 SE, and the G903 Lightspeed (this model being reviewed). They are apparently switched to cheaper manufacturing and parts, because there is no longer an audible or tactile feedback from pressing the Middle-Mouse-Button (MMB) present on older models and any generic $10 mice. In addition, the mouse developed a double-click issue within weeks of receiving it, while my years old G900 only started doing that recently. Without MMB feedback, playing many games, especially strategy games, becomes extremely unreliable and uncomfortable as you are never certain if you actually pressed the MMB. In fact, it's not just the feedback, more often than not it simply isn't actually pressed, leading to lots of issues. Even worse when it is pressed, but then releases half way through something even though you are still physically pressing it. You can never tell, so much that I had to remap the controls to another button (MMB Scroll-Left), which on the mouse DOES have feedback. So while there is feedback for Scrollwheel Left/Right, as well as Up/Down, pressing on it for the MMB doesn't, which is baffling. This is even more disruptive when doing 3D work like 3D modeling, causing all sorts of headaches when the mouse just decides to mess up your models by double-clicking and releasing MMB constantly. It becomes such a hassle that any generic $10 mouse becomes more usable and productive. And even with the feedback issues and the fact that it just doesn't respond sometimes, the older models did NOT have this issue. Both my G900 and my G900 SE do have feedback on the MMB, didn't have double-click issues immediately within weeks (conveniently after the Amazon return period), and effectively have all the same features of the G903 Lightspeed. Yes, the battery life is amazing and I have to give them kudos on that, but they are great on all the G900 series mice so it's nothing new. TL;DR: If your games and work rely on having a functional middle mouse button, and you don't want your approximately $130 (USD) mice from becoming unusable due to double-click issues, look elsewhere.