I've just received one of these. I have to say that it looks to be of reasonable quality for the price. The surface is smooth and untextured but that will be largely irrelevant for me as I'll be having a walnut veneer panel.
There is no obvious way of securing the lower edge so the assumption must be that the shape and rigidity will be sufficient to align it correctly if the top screws are secured.
Not a chance of offering it up to the car today as it is fairly hissing down outside