Unfortunately, they don't break your test out between sections when you get the offical report, just quant/verbal/AWA.
I didn't take a course so can't say from firsthand experience. If you read through this forum, it seems like not many people here take courses. Which isn't surprising, I think courses are mainly for people that don't have time or motivation to research and design a study plan. The people that have found this site are probably a little more motivated than most, and as such, they would rather study on their own because they know they can do a better job on their own.
I think classes are more of a hand-holding way to go about studying. People I know who have taken classes say they do it because they "can't force themselves to study" so the class is a good way to force them to study. There are no "secrets" revealed in these classes. If you purchase something like the Princeton Review
"Cracking..." or the Kaplan 800
you'll get everything you would get from a thousand dollar course.
A common complaint I've heard from people who take classes is that people in the class ask very basic questions that take up time from the class. So if you've already memorized the Pythagorean theorem and you already know how to handle a rate problem, you might be bored in a prep class. I think the prep classes are good for people who (a) desire a structured schedule to force them to study or (b) are seriously behind in math or verbal and need to learn the basics in a classroom environment where they can have teachers help them.