Enhanced Rider Scheme insurance discount?

Has anyone actually got an insurance discount with this scheme or is it just a waste of time and money? (apart from maybe learning something)

I did the ERS and gained a massive discount on my insurance renewal, a whole £8!

Seriously though, it was good fun and I did learn a lot. If you do it it should be to improve your riding rather than to save on insurance, because you won’t save on insurance.