Actually, it's a commercial, instrument, and multi-engine end-of-course certification stage check. The TCO is a package deal, although two of the intermediate stage checks are based on the instrument and commercial PTS's. And FWIW, the school has examining authority for the course, which (unless something has changed) requires a pass rate slightly higher than 60%.

Anyway, back to the discussion. I used to give some interesting approaches to my students to fly in the FTDs, as well. If you can, get your hands on some Mexico plates. It's much more fun when you're cleared for a full procedure approach at FL200.