If you love memory (as voxels will eat that stuff for breakfest, lunch, snacks, and supper), hate proper dimensional stability (as voxels have an inherit resolution, higher resolution will use up a lot more memory), then voxels are awesome.
So, good for some things, bad for others. (And, as you might notice I'm not a huge fan. Voxels are like "multithreaded" "xml" and a few other technologies. They always seem to popup at some point, pushed as "the ultimate solution for everything!")