I worked for Midwest as a controller for 5 years. The managers get paid hourly, not sure the rate but it's obviously more than a controller. The pay is the same across the board. Most managers are promoted from within and seem to range in experience. The big disadvantage to the position is that they are responsible for covering the shifts of all the controllers, so personal/sick time, and vacation. Which means if the manager is t taking vacation for a holiday then he is working it because a controller will take the time off.
You need to be in the know. Mostly if you work at the facility its a wait for you to be the next one situation. Pay is hourly and usually $3/hr more than controllers. NO HOLIDAY PAY. You work the holiday, you take an unpaid day within the same week. Filling in for controllers on days off. Plus, they don't relay things on time and them blame you for it not being done.