I think this also goes by the name "acoustic carpet".
It's a lot thinner than regular carpet, and usually used for parcel shelf/headliner applications, and will be glued into place.
I have actually used it on the interior side panels of my kit car which i think looks pretty smart, not sure i would want to use it on the floor as
i'm not sure it's the most durable, and too thin to use on it's own for a removable application.
I have a transit minibus that is fully lined with it, roof, cupboards and door panels. It's good stuff, various colours can be had too.
Definitely not for floors. I use carpet tiles for that, cut to fit. Cheap and easy to clean and replace.
As said great for side panels and headlining but not very durable for floor carpet if just fitted this carpet in my hotrod including floors but I have
fitted rubber mats in the foot wells so will see how it wears
I've done it, but it's very thin. I've just re carpeted a caterham and the thicker carpet I used was much easier to use bizarrely.
I only carpeted the back panel, the transmission tunnel and the boot floor. Looks great.