Hi,
We do use TRAILS in Brookfield. Every freshman takes the 9th grade TRAILS assessment in their science class in September. I create and manage the session, and distribute access codes to teachers. When the assessment is completed we can measure our student's weakest areas as a group individually by student, by class, etc. (those areas are usually "developing a topic" and "evaluating information")
I wrote one of my SLO's around an identified area of weakness. Because the science classes also require research skills, they use this information to identify which areas of the research process they will need to structure more heavily for their projects.
Students post-test with the 9th grade TRAILS at the end of the year and we can measure growth with those numbers.