Nice. Would be a bit nicer if they were slightly lighter. Something more intermediate between the allwhite and allblack. I think these look nicer than the allblack with a very light theme.
Well this is an extremely late reply, but I'll reply for the benefit of anyone else who happens to see this. But if you go into ~/.icons/ALLGREY/ you will see a file called icon-theme.cache, if you rename or delete this file then the icons will be grey as expected.