Suggestions/Unsuggestions

If there's anything MeFites love, it's a good gadget... so how's the auto-suggestor/unsuggestor working out for you? Any phenomena? Stupidity? Sweet out-of-the-blue recommendations? After a certain popularity threshold, does the Unsuggester just go straight to Tuesdays With Morrie?
Thumbs up or thumbs down?

The Suggester is getting better as more people start/grow their LT libraries. I do wish that it would automagically remove suggestions that are already in a user's library (if the person is logged in).

Last time I tried the unsuggester, it seemed to be very sensitive to the specialized libraries catalogued here -- there is minimal overlap between programming libraries and christian literature libraries, and so the Un-suggested books can really come out of left field.