I use xim 4 with a red Dragon mechanical keyboard and razor deathadder essential mouse. Yes keeping track of your target is easier, but stay out of close range lol. To be effective with M & K, you can't go higher than a 1/2 ratio. That means 1 inch mouse movement equals 2 inch movement on screen. Which around 6-7 sensitivity on a controller. Most pro players run a 1/1 ratio because it's more intuitive. Yes it is possible to bypass the games sensitivity.... and by a crazy amount. Imagine a 30 sensitivity on COD BO3 (It's possible to do with xim 4). However ppl don't up the sensitivity too high because you things like jitter which can cause headaches and hellish strain on the eyes, not to mention skipping pixels. Which means accurately shooting anything is next to impossible. Using M & L has it's ups and downs, make no mistake. It's just a preference. Like some the Xbox controller over the PlayStation controller and vice versa. To anyone who says using a mouse is like cheating are either jealous or simply ignorant. People that have played and fps on keyboard and mouse know the pro and cons and would say it's fine. There's a reason it isn't against the Xbox ToS lol.