I don’t have them, I wasn’t keen on the look, they’re awkward when not in use and I thought, a little too deep, if you’re short and sit low they’d be fine,
One day, I might get round to making my own coloured Perspex ones, but I’ll make them only maybe 2 or 3 inches deep.
I bought a pair of expensive polarised sun glasses for the first time last summer, they’re incredibly good, why I hadn’t tried them before I’ve no idea, they’ve negated the need for any visors.
I use both the visors (in tint with the upholstery) and Rayban polarised Aviators. I would not be without either of them.
When the sun starts to get low I tilt the visors up above the screen and then later pull them down. They are not perfect because they don't protect you when the sun is off to one side and you cant turn them to the side as you can with most modern cars, however they are certainly better than not having them.