Just did a 135 recurrent at FSI Wilmington a few weeks ago. My check airman was really straight forward as far as the profile. Know the system basics and emergency/limitations cold. Setting up the FMS properly is crucial. If you get a FSI PNF he/she will know the profile better than anyone and make sure you don't get yourself into a snare trap.
FSI instructors don't try to trick you into mistakes but if you guys are making mistakes ie not reading checklists properly, bad decisions, pressing a bad approach, etc they will let you continue to see if you can dig yourself out or make a decision to snap the accident leading chain of events and debrief it later.