Jjones,
Is the format easy enough, or is it very tough with very little interaction with subject matter experts or professors?
I've taken classes at a few colleges and WGU has easily been the best (and least expensive) college I've attended. The courses are well planned but it can be a difficult college if the student isn't organized and self motivated. There's also quite a bit more work per course than you'd do if you went to a traditional college. I find that I write, on average, about five 2 page essays per course...but that's usually all a course requires to get credit as well.
There are some tests as well, however you can opt to take them at a testing center or in your own home while being proctored through a webcam.
It's also very easy to get in touch with whoever you need, be it administration or your professor and the college also assigns you a mentor you have phone meetings with on a regular basis just to touch base with you. Everyone's been very helpful and friendly so far.