I own many pairs of Car Shoe Driving Loafer, some of them bought in the first year of 2000 before the driving loafer hype.
They are surely the best driving loafer on the market considering the big brands.
But see also Miserocchi Range http://www.miserocchisnc.it/
They are the original maker of the Car Shoes, they were the owner of the Registered Patent that was sold to Prada togheter with the use of "Car Shoe" name, they still produce with the original machinery that made even the famous Agnelli driving loafers.
Regarding the sizing advice, I wear UK 8.5 in most english brand and usually 8 in Italian brands, and I wear 8.5 in Car Shoe.