What exactly does this do? Any real noticable benefit from using this?
Any pros/cons to using this vs not using it
That really depends on what apps you use it on. Here's a guide for you
Pros = less battery drain if you have hungry apps
Cons = you will probably not receive notifications from the apps you use it on
The difference between this and auto-restart manager is that Super Clean force stops apps and auto-restart manager makes sure they can't start again