Freerolls helped me sharpen my short-stack play big time. Since stacks are often shallow and blinds go up fast, you’re constantly in push/fold spots. That forced me to study ICM and preflop ranges more seriously. It’s not glamorous poker, but if you can master survival mode, you’ll be way more confident in real tourneys when the pressure’s on, that's for sure! The main thing is that you need to play them conciously that you are not a pro. They are a tool to help, not the final end.