I've had it on 4 cars since 2014 (Cayman, 340i, Arona, Macan) and wouldn't want to drive a car without it! Although the XC60T8 I drove with it was far too conservative and I turned it off, and in a manual Golf is was pointless unless you were prepared to work with it through gear changes.
I think the usefulness of it is very dependent of how it's set up and where you drive. I really like it on crowed motorways and inner London.