I took it a couple years ago. Its basically an overview of everything trauma, so in that sense, its pretty much stuff you should already know. It does go into a bit more detail on linking MOI with expected injuries than I remember from my basic training, and there's a specific assessment methodology that they teach that's a bit different than the standard assessment techniques I was taught (nothing earth-shattering, just a little different spin). I really enjoyed it for a couple of reasons:
1) While they don't necessarily teach you anything new, the class does give you a comprehenisive look at trauma and gives you some simple methodologies for rapidly assessing a trauma patient. Quick determination of "stay and play" vs. "scoop and run" was a big focus, and there's a couple of techniques that I learned there that I use to this day.
2) The class I took was mixed ALS and BLS, with a couple of nurses thrown in for good measure. It was great to have a chance to work with ALS level providers in an educational setting, particularly since a couple of the guys I was working with happened to be medics on the Sheriff's SAR helo that we occasionally work with in R/L.
3) I got to try some ALS skills that I wouldn't be able to do in R/L (intubation, needle crich, etc...on a manikin, of course) This was done with the understanding that we weren't being "trained" to do it but rather just getting familiarity with what ALS does. Still, was interesting and a good exposure.