Mounted properly, they can look really good, nearly like the real thing, but I had fake white walls once and I would not do it again:they are kind of hard to put on (centered), they are easily damdged or marked (hit a side walk...) and they can end up making waves, or yellow, even moving... Also avoid mounting on tires with raised letters, or halfway on the side lettering of the tires, this looks really bad!
If you have no choice, sure but otherwise, I would recommend the real thing
