Just done it in june. The sim ride is a handling check. No crew work or so. Departure from Dub SID (a very simple one), then, some basic handling : climbing and descending turns, engine shutdown with no drill, and single engine NDB/VOR to the ILS to land.
Apparently he wants to see an improvement during the sortie (about 30 minutes), and he doesn't tell you anything except headings and heigths.
Pretty strange for a fast jet pilot with no multi engine experience, but went through it, and got an offer for the job.
If you need more, feel free!
cheers