Bests & Worsts Reviews from Amazon

As yet another G Pro user, I am extremely happy with this mouse, and will also be using that as a point of reference for this review. Build quality is excellent, feels sturdy, perfect weight for me (I actually welcome the couple extra grams of weight from the G-Pro, no need for those AAA - AA converters for me) I have absolutely no rattle, and the buttons feel great. No RGB on this mouse, which I'm perfectly fine with. The feet are slightly slimmer and longer than the G-Pro, and there's also an additional small circular foot on the bottom, I think this does actually help quite a bit with the weight distribution as your hand is on the mouse. The left/right click feel as though there's a slight bit more travel distance from the G-Pro, but overall very responsive and consistent. The thumb buttons have MUCH less resistance and are very light and also feel slightly more chiseled than the G-Pro. I also notice the switch of the bottom thumb button somehow feels angled better for clicking using the middle of your thumb. The scroll wheel is set deeper in the mouse and is scrolls clickier than the G-Pro, but will likely smooth out a bit over time. I saw some reports of it being hard to click - this is not the case for mine, it's even easier than that of my worn-in G-Pro, and feel much nicer overall. The DPI button feels exactly the same as the G-Pro, just slightly smaller. The new Hero sensor is perfect. I cannot spot a single flaw, and while it can be extremely difficult to notice any difference between the PMW3366 and the Hero (especially considering wired vs wireless), I do definitely accept the claim that it is better. I can't speak on the battery life yet, as I'm not 250 hours into a battery to tell you if that's a true statistic or not, but I'll edit later if it is something to groan about. Not much to say about software either - it works. If you're familiar with Logitech software it's about the same for all. All that said, if you like the shape of this mouse (G-Pro, 203/102, general small ambi mice), you'll be happy with an upgrade to this - and yes, it IS an upgrade in my opinion. TLDR: Good mouse. Good sensor. 5/5.