This is simple.
Average SIM hourly rate, say, £150.
Average Twin IR-type aircraft hourly rate, £350.
RANT XL costs £89 and is pre-loaded with a large number of regularly used STARs and SIDs including Cranfield.
So if RANT saves you half an hour in the SIM or 15 minutes in the aircraft you've broken even.
And once you've got your IR and need to brush up to keep those skills because your 4000th CV had gone unnoticed, load up RANT....