Yes - I am getting rather good results too 
- latest video here: https://youtu.be/q5--JWUp4sg
Still some way to go, but very playable! One of my next tasks is to make some levels to see what needs tweaking in more detail.
enabling physics substeps and decent suspension have been the most vital steps to make physics constrains+RBwheels work well so far - sure more can be done, but the silky smooth collisions from giving it up sure do look tempting