I have a set as well. Only gripe is that the rear plate sits flush, whereas the larger front insert is recessed. Also, they're not really black. A weird black coating on them.... think of color printer making black, rather than black cartridge. Still.... it really spices up the interior, and I'm very happy with them.
Also, they do not come with any adhesive. I used black silicone, and that has worked great so far.
I'm such a girl when it comes to accessories. I have the chrome GTO logo valve stem caps, the chrome LS2 w/pontiac arrow oil cap, and I'll be getting the metal floor clips some time later. lol. I don't think I'll spring for the metal cup liner/insert.... that's just taking it too far. I'll post pic's in a bit.