This one took awhile because I struggled with the computer not loading things. I ended up sticking with radio programs and did OK with that. If your computer has the appropriate software and enough speed, this is very cool. As with some of the other 23 things, I found myself drifting around and spending quite some time playing and I see the great opportunities that are out there - don't worry about missing the program, just listen to it at your leisure.
Again, the training opportunities here are vast.