Funny you should ask that - just been on one
Got a mix of some good stuff
Some outdated statistics
Some urban myth
And a lot of prejudicial opinion from the instructor (ex-police officer) who clearly has a bee in her bonet about things like risk assessment.
Most of the material on screen was OK but a bit out of date - watch out when they go "off piste" though.
The one really good thing I learnt (which I guess could save my life) was a bad habit I didn't realise I had until it was mentioned in passing - If you're waiting to turm right with oncoming traffic *never* turn your front wheels in anticipation - if you're rear-ended you'll be pushed into the oncoming traffic.
Probably something everybody's taught now but I'd never even thought of it