I actually ramped up my sensitivity because I found I was getting beat on corners and sudden gun fights because by the time I turned around I was dead. Mind you it took about 20-30 to tweak my muscle memory to control it and be successful with it.... Another thing that I find worked alongside side my sensitivity to better myaim and reaction was when I started using these bad boys...
http://www.razerzone.com/ca-en/gamin...er-chimaera-51
The 50mm driver with Neodymium magnets creates such a crisp 5.1 doubly surround sound that I can actually hear which way your coming behind me and turn towards you before you can react to my tur king around which often gets me the first shot,especially since my high sensitivity allows me to 180 quickly
On a side note what are your thoughts on using stick attachments to improve grip and such... Do they work? Or would I be wasting my money.