A thanks for Virtual Libraries

I'm late to the party, no doubt... But I've recently found use for the virtual libraries feature, and it's great.
Defining them via advanced search was easy enough in my case (except for the fact the "save as" button is a bit hard to find under Safari/OS X :)

With a virtual library I was able to liberate a user from building and manipulating playlists; instead he can let players roam over the entire virtual library, and no further. Very good indeed.