I don't know how good it is quite yet... only drove around with it this morning shoved under my dash. Hit some bad spots, so I pulled it through the glovebox and on top of my dash and it was a little better...
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
I plan to attach it to my rear drivers window, since I never look out of it when driving.
I'll have to do some research on the plug sizes and such... I'd hate to pull the headliner and find myself putting everything back to do it again because I wasn't prepared!