now i can give you my straight opinions after testing it deeper
+ sensor, for gaming purpose, just perfect
+ scroll-wheel, not as stiff as i was afraid, fairly in the middle of soft and stiff
+ side buttons, it was too soft at first impressions. overt time, i get used to really appreciate them, they are smooth and quite quiet which is good if your daling/parents/baby sleeps next to your computer desktop
+ glide on my hard-pad, completely smooth and quiet while my former and sold Logitech does make a slight glide noise
+ customization, its still nice to custom any aspect such as DPIs, programmable buttons, LoD, LEDs colour...
+ nice coating, its mat but very smooth. I never have such feeling with this kind of mouse coating. I am very sensitive about coating feeling (but smoothness its always good for fitting hand grip better)
- its my opinion but my hand grip doesnt fit at 100%, i am not really claw, i would say i have an hybrid grip hand between palm and claw (most likely closer to the palm grip though)
- software failed once after testing LEDs, and mouse eventually stop working, it worked fully normal after reboot computer...
+ click makes still noisy sound imo, there is less difference between left/right click (not noticeable unlike the previous faulty model), it makes a crispy sound.
I know some people love this sound but i don't, i would rather pick quiet sound click instead of this but its minor con and highly subjective as well
- I noticed the coating area where my thumb and little finger hold on the mouse has been turned into grass and glossy aspect, i have sweat hands, dunno if it could severely damage coating.
I would put 9,5/10 for the sensor (but i would test on cloth pad whether glide would provide more accuracy according OCN, it fits better on soft surface) and 8/10 for ergonomic aspect
i eventually recommend it for potential buyers