I would like a Turbo button, just like on computers in the 80s/90s.

[Shrink36s]

My first car topped out at 55 as along as I was going downhill with the wind at my back. I think 8s is going to be just fine.
Bonus if both Slate windows roll down and the a/c works.

 

[cadblu]

I would keep the windows rolled up and the roof closed (on the SUV) to reduce wind turbulence. The fact that the roof panel is removable on the SUV, although a nice feature, is somewhat concerning. I’m referring to the “coke bottle” effect. Also known as “Helmholtz resonance.” Feels like your eardrums are going to pop.

 

[KevinRS]

I would keep the windows rolled up and the roof closed (on the SUV) to reduce wind turbulence. The fact that the roof panel is removable on the SUV, although a nice feature, is somewhat concerning. I’m referring to the “coke bottle” effect. Also known as “Helmholtz resonance.” Feels like your eardrums are going to pop.

I think the open air version would be meant for relatively low speeds, not freeway so much. Just having one or more back windows open in my car and not the front I feel resonance that is very uncomfortable for my ears, but the wide open open air kit shouldn't have that much problem, at least at lower speeds.