Train anywhere/anytime - even out hacking.

Train outside of lessons - save valuable time. Make your instructed lesson time more productive.

Track your progress objectively - Measure and record your performance.

Develop/improve/top up your muscle memory.

Use Equepoise to correct asymmetries - many riders have a strong side and a weak side which they may not even be aware of whilst riding. For instance a raised heel on one side is a common asymmetry which training with Equepoise can fix.