I did it. I felt that it was misrepresented, though I am not sure if that is the MSC's fault or the local chapter that runs it (I expected to be there for about 2 hours and ended up there for 4). I was there (on site) for 4 hours and spent probably another hour reading the guidelines and inputting the report. Not terrible money, but it makes for a long night when you've already worked 8 hours and have to work the next morning!
It's not terribly difficult, though you have to listen carefully throughout the entire thing and getting names can be difficult.