10 months on and the mouse size wise for me is good and comfy.
The response in games like BF1 is good in terms of turning around to target etc.
The scroll wheel i find to be honest rubbish. I scroll with it to change weapon and some times nothing happens and sometimes it as if i have scrolled forward then back at the same time. I say this as the character goes through the animation to chnage weapon but ends up back with the same weapon i already had out.
The 2 buttons on top of the mouse side of the left click, the one closest to the front of the mouse has stopped working (button 5) but still clicks and feels firm, i have tried all sorts with it to try and see if its a firmware/software issue but it just doesnt show a press.
The battery life is excellent it lasts all day and when i put it on the cradle to charge at night it still has lots of life left.
The cluster of buttons on the side are awkward for fps games i find, as i often find i miss the button im trying to click and end up hitting a different one.
As i clasp grip the mouse the bottom front side button (button 7) is in the way and i usually have it said to knife/bayonet charge and when im turning around i often grip the mouse where that button is and end up knifing nobody lol.
All in all its a good mouse if you like battery life and a good sized mouse. But it does have quite a few little quirks to me.
I was even considering buying Roccat Leadr -
http://www.roccat.org/en-GB/Products/Gaming-Mice/Leadr/
I should send this back for replacement as its got faults but i hate being without a mouse and dont have the funds to buy a new mouse as of yet.
I do also like the fact i can have different profiles for different games on board the mouise and switch between them as and when i need too.