Its a piece of cake, 2-axis lathe, you'll beat your head against the nearest brick wall wondering why you ever bothered with g-code on a lathe, particuarly in a job shop environment.
If you have half a brain, and a knowledge of any kind of programming, which I know you do, you'll have it up and running in no time. It does take a bit of time to learn what it wants for some things (grooves, Id face is a pain), but basically a few hours to figure out your first program if its moderately simple.
On the mill, a little tougher, a little more limited in tool paths, but its great for the simple parts.
If there is somebody there to give you a crash course, and answer the tougher questions when they come up, piece of cake.
My only advice is 95% of the time, you don't have to lie to it, especially on the lathe, you lie a little more on the mill. You'll learn real quick were you have to lie to it, and if you're lieing to it too much, then there is something amiss, some little thing that you are missing, didn't pick up or aren't taking advantage of.
Good luck.