i think it would be a great help for IR practice. I did an intense IR programme so did not have the time to spend hours messing around on flight sim x trying to learn how to use it and then fly it accurately.
However i know for a fact if i had invested a few hours in learning how to play the game before I started the course that it would have been a huge benefit during the course for
- learning about the instruments
- practice for flying approaches
- descent mangement