Perhaps I should have further elaborated. There is absolutely value in training via a simulator, and it *could* aid in significant performance improvement in UPT. The caveat is exactly what Pooter is discussing above, it must be used in a focused, methodical manner involving some sort of curriculum. Simply playing around and doing barrel rolls and loops in a VR sim is useless, I watch students do it constantly each day in the squadron. I see students screw around for an hour in the VR sims supposedly rehearing a formation sortie only to royally bomb the sortie the next morning. However when another IP or I sits next to them and talks them through training goals, forces them to set up properly and rehearse, and hold them to performance goals, there is noticed improvement in their performance in the aircraft.