Today I received a message from Google and they now support Google Assistant without any additional hardware for your vehicle. At first I was very skeptical about if it would work or just be another dismal adventure. But to my surprise it was so much better than the Roav Bolt. The Roav Bolt might be a better fit for someone that only has a aux connection, but it was too little, too late for me.
Google Assistant for your car... minus the Roav Bolt
Thanks for sharing 
The roav bolt is literally terrible. I cannot and will not recommend it