...as I own BOTH styles of sunshade.
I have that EXACT "Porsche Tax" one with the Porsche logo and case, it's actually the OEM product.
And, I own the "circle" style that folds up and fits in a seat pocket.
The big, expensive Porsche one rides behind my driver's seat and works great. I'm short, so there's enough room back there.
But....the circle style works fine, and is WAAAAY more convenient to deploy and store.
I bought the Porsche OEM one for the perfect fit and better heat reflective capacity, but, damn, I wish it didn't have "Porsche" emblazoned on it for all the world to see.