last month I renewed my IR and used MSFS a lot for a week prior to the test to brush up on my scan as much as anything. Rant is an excellent bit of kit for learning the art of tracking, intercepts etc and has ADF dip along with built in tutorials. You cannot practice your scan on Rant though but can on flight sim.
Learning and practicing your instrument scan is as important as learning how to follow the needles. One thing to be aware of is that the ADF and RMI needles on flight sim are back to front.
Up until five and a half years ago I was flying commercially until a change in circumstance but revalidated my IR the last couple of years with the help of these programs, the only flying that I did were the tests themselves, it probably saved in excess of a grand each time.