I do EAMs before I run my regular route. I have a 6:30 AM Start Time. Since we are just a couple of miles from the Atlanta Airport, most of my Hub has a 8:00 Commit Time. If I have a Sendagain, I am able to get back to the Hub before everybody else leaves with their regular Start Time. I hit overtime at 3:30, and 9.5 is 5 PM. I usually return to the building at 4:30. Most of our EAM Drivers are FT Drivers with Bid Routes. The most Senior Driver is the Shuttle Driver, he probably averages 55 hours a week.
The pros of my job is I miss rush hour traffic going to work and I get off early. The bad part is I work the same amount of hours and I lose sleep because I can't make myself go to bed ealier. I do enjoy it in that it breaks up the monotony a little by looking up deliveries in a map book and driving in different areas. I would suggest that you talk to the other EAM Drivers in your building and find out all the particulars in your area. It could be a good gig or a bad one.