Dear Franz,
my company does use this system at sim RT/LPCs and my experience has been quite satisfying.
Do not forget that for a sim session there is also a huge part of briefing/debriefing and that in a well constructed LOFT scenario there will also be the need to use plain language, either with cabin crew/company/pax or to discuss the actual scenario with your fellow crewmember when a "not so by the book" situation arises and considerations/options/decision making come into play before even getting into a technical procedure.
Regards,
Davide