Yeah, I teach it for Private, Instrument, and Commercial.
It is beneficial for the motivated student, but for students that don't have a strong desire to fly, it often ends up taking more time than in Part 61 syllabi.
The whole scenario based idea kind of goes out the window, some scenarios get used but sometimes making them up is pointless for the flight. The application of FITS in Commerical is much better than that of Private and Instrument because we can simulate actual commercial operations.